This page in your language

فارسی

العربية

Deutsch

Español

Français

日本語

한국어

Português

中文

हिन्दी

B1 noun 13 min read

戸籍

koseki

Practice it Examples Notes & Tips 戸籍 in 30 Seconds

Explanation 戸籍 in your Level:

Koseki is a special Japanese paper for families. It shows who is in your family, like your mother, father, and siblings. In Japan, everyone has this paper. When a baby is born, their name is put on the paper. When people get married, they get a new paper. You go to the city office (Shiyakusho) to get this paper. It is very important for life in Japan. You can think of it like a 'Family List.' Even if you are just starting to learn Japanese, you might see this word at the city office. It is written with two kanji: 戸 (door/house) and 籍 (record). Together, they mean 'house record.'

Koseki is the 'Family Register' in Japan. It is an official document that lists a person's birth, marriage, and family members. Most Japanese people have their Koseki at the place where their family is from, which is called the 'Honseki.' If you want to get a passport or get married, you need to go to the city hall and ask for a copy of your Koseki. There are two main types: 'Tohon' (the whole family) and 'Shohon' (only one person). Foreigners living in Japan do not have a Koseki, but they have a 'Juminhyo' (residence card). Learning this word helps you understand how the Japanese government keeps track of its citizens.

戸籍 (Koseki) is the Japanese family registration system. It is a fundamental part of the Japanese legal and social structure. Unlike in many other countries where records are individual-based, the Koseki is organized by family units. A typical Koseki includes a married couple and their unmarried children. When children marry, they 'leave' their parents' Koseki and start a new one. This word is often used with verbs like 'nyuseki suru' (to get married/enter a register) or 'koseki o toru' (to obtain a copy). It's essential for legal procedures such as inheritance, marriage, and proving one's identity for official documents like passports. Understanding Koseki is key to understanding Japanese concepts of family and citizenship.

The Koseki system is a unique method of civil registration that serves as the primary proof of Japanese nationality. It functions as a comprehensive record of a person's vital statistics from birth to death. For intermediate learners, it is important to distinguish between the 'Koseki' (the register itself) and the 'Juminhyo' (the residency certificate). While the Juminhyo records your current address, the Koseki records your legal lineage. The register is maintained at the 'Honseki-chi' (registered domicile), which might be different from one's actual place of residence. In recent years, the Koseki system has been a topic of debate regarding gender equality, as it currently requires married couples to share a single surname, a rule that many find outdated.

The Koseki (family register) is an institution deeply rooted in Japanese history and legal tradition, originating from the Meiji era's efforts to centralize state control. It acts as the definitive legal proof of family relationships and Japanese citizenship. From a sociological perspective, the Koseki reinforces the 'ie' (household) system, prioritizing the family unit over the individual. Advanced learners should be aware of the complexities involving 'mukoseki' (statelessness) and the historical use of Koseki to discriminate against certain social groups. In legal contexts, terms like 'Koseki-tohon' (certified copy) and 'Koseki-shohon' (extract) are vital. The system also presents unique challenges for international marriages and the LGBTQ+ community, as the legal definitions within the Koseki are slow to change.

At the C2 level, one must appreciate the Koseki not merely as an administrative tool but as a cornerstone of Japanese identity and a mechanism of social gatekeeping. The system's reliance on the 'hittosha' (head of register) reflects a patriarchal lineage that continues to influence modern civil law. The Koseki's role in 'Koseki-jyo no fufu' (legal marriage) versus 'jijitsukon' (common-law marriage) has profound implications for inheritance and parental rights. Furthermore, the digitalization of Koseki records and the integration with the 'My Number' system represent a significant shift in how the state manages personal data. Critical discussions often focus on whether the Koseki system is compatible with modern human rights standards, particularly concerning the mandatory single-surname rule and the rights of children born outside the traditional family structure.

Practice it Examples Notes & Tips

戸籍 in 30 Seconds

Koseki is the official Japanese family registration system that documents vital life events for all citizens within a specific family unit.
It serves as the ultimate legal proof of Japanese nationality, lineage, and family relationships for administrative and legal purposes.
Managed by local municipalities, it is required for major tasks like applying for passports, managing inheritances, or finalizing marriages.
It differs from Western systems by focusing on the family unit rather than the individual, tracking history across multiple generations.

The Japanese word 戸籍 (Koseki) refers to the official family registration system in Japan. Unlike many Western countries where individuals are tracked through birth certificates or social security numbers, Japan uses a unit-based system centered on the family. Every Japanese citizen is recorded in a Koseki, which serves as the ultimate proof of identity, lineage, and legal status. It is a comprehensive record that tracks births, deaths, marriages, divorces, and adoptions within a single family unit. When you hear this word, it is almost always in a legal, administrative, or deeply personal context regarding one's heritage or civil status.

Administrative Importance: The 戸籍 is managed by local municipal offices. It is required for major life events, such as applying for a passport, claiming an inheritance, or verifying a marriage. Without being listed in a 戸籍, a person effectively lacks legal recognition in the Japanese system, a situation known as mukoseki (statelessness within the system).
Unit Structure: A standard 戸籍 typically consists of a married couple and their unmarried children. Once a child marries, they are removed from their parents' register to start their own. This reflects the traditional Japanese view of the family as the primary building block of society rather than the individual.
Terminology Nuance: You will often hear the terms 戸籍謄本 (Koseki Tohon), which is a full copy of the register, and 戸籍抄本 (Koseki Shohon), which is an extract focusing on one individual. Knowing the difference is crucial when navigating Japanese bureaucracy.

結婚するために、役所で戸籍謄本を取り寄せた。
(To get married, I requested a full copy of my family register from the city office.)

Historically, the Koseki system dates back to the 7th century, but the modern version was formalized during the Meiji Restoration in 1872. It was used as a tool for taxation, conscription, and social control. Today, it remains a point of significant debate, particularly regarding the rights of international couples (since only Japanese citizens can have their own Koseki) and the requirement for married couples to share a single surname. When a person marries a Japanese citizen, their name might be noted on their spouse's register, but they do not "own" a register themselves unless they naturalize.

彼は帰化して、自分の戸籍を作ることができた。
(He naturalized and was able to create his own family register.)

Furthermore, the Koseki is deeply tied to the concept of ie (the household). Even though the post-WWII legal reforms shifted focus toward the nuclear family, the psychological weight of the "family line" remains. For example, some families still check a potential spouse's Koseki to ensure there are no "unfavorable" ancestors, although this practice is increasingly viewed as discriminatory and is legally restricted. The document tracks your entire life path: where you were born, who your parents are, when you moved, whom you married, and eventually, the date and place of your death. It is the permanent shadow of a Japanese citizen's existence.

親の戸籍から抜けて、新しい世帯を作った。
(I left my parents' family register and started a new household.)

In summary, 戸籍 is not just a piece of paper; it is a legal institution that defines family relationships and citizenship in Japan. It is the primary source of truth for the government and the ultimate identifier for the individual. Whether you are dealing with inheritance, marriage, or official identification, understanding the role of the Koseki is essential for anyone living in or studying Japanese society.

Using the word 戸籍 (Koseki) correctly requires an understanding of Japanese administrative verbs and the specific documents associated with the system. Because it is a formal noun, it often appears with verbs like toru (to get/obtain), hairu (to enter), or nuku (to remove/extract). It is rarely used in casual slang, but it is ubiquitous in adult life and legal discussions.

Obtaining Documents: When you need the physical paper, you use verbs like 取る (toru) or 取り寄せる (toriyoseru). Example: Koseki tohon o toru (to get a full family register copy). This is a common task when applying for visas or passports.
Marriage and Divorce: Marriage is described as 入籍する (nyuseki suru), meaning to enter the register. Conversely, divorce involves 除籍 (joseki), which is the removal of a name from a register. These terms are used even in casual contexts to mean "getting married" or "getting divorced."
Genealogy and Research: If someone is tracing their family roots, they might say 戸籍を調べる (koseki o shiraberu). Because the records go back generations, this is the most reliable way to trace Japanese ancestry.

パスポートの申請には、発行から三ヶ月以内の戸籍抄本が必要です。
(For passport applications, an extract of the family register issued within the last three months is required.)

In a legal context, Koseki is often paired with Hittosha (筆頭者), the head of the register. This is usually the husband in a traditional marriage, but it can be the wife. When filling out forms at the city hall, you will almost always be asked for the name of the Hittosha and your Honseki-chi (registered domicile). This registered domicile is not necessarily where you live; it is the physical location where your family records are stored. Some people keep their Honseki at famous landmarks like the Imperial Palace just for fun, though most keep it at their family home.

私の戸籍は、京都の実家にあります。
(My family register is at my parents' house in Kyoto.)

Another important usage involves the term Koseki-kakari (戸籍係), which refers to the section or the clerk at the municipal office who handles these records. If you are lost at the city hall, you might ask, "Koseki-kakari wa doko desu ka?" (Where is the family register section?). Furthermore, in discussions about social issues, you might encounter Koseki-seido (戸籍制度), meaning the "family register system" as a whole. This is a common topic in political debates regarding gender equality and the rights of sexual minorities, as the current system is strictly binary and based on traditional gender roles.

日本の戸籍制度は、外国人には少し複雑に見えるかもしれません。
(Japan's family register system might appear a bit complex to foreigners.)

Finally, when someone passes away, the family must perform shibo-todoke (death notification), which results in the deceased being removed from the active register. This process is essential for settling estates. Thus, Koseki is a word that follows a Japanese person from before birth (when they are added to their parents' register) until after death. It is the narrative thread of a person's legal life.

戸籍上の名前と、仕事で使っている名前が違います。
(My legal name on the family register is different from the name I use for work.)

彼は自分の戸籍を新しい住所に移した。
(He moved his family register to his new address.)

While 戸籍 (Koseki) might sound like a dry, bureaucratic term, it pops up in surprisingly many places in Japanese daily life, media, and conversation. Understanding where you'll encounter it helps bridge the gap between textbook learning and real-world usage.

At the City Hall (Kuyakusho/Shiyakusho): This is the primary location. You will hear staff ask, "Koseki tohon wa hitsuyo desu ka?" (Do you need the full family register?). Signs will point you to the Koseki-ka (Family Registration Division). If you are moving or getting married, this word will be repeated constantly.
In News and Politics: The Koseki system is often at the center of national debates. You'll hear news anchors discuss Sentakuteki Fufu Bessei (the choice of separate surnames for married couples), which would require a major change to how the Koseki is structured. It is also mentioned in cases of dual citizenship or the rights of children born out of wedlock.
In Legal Dramas and Detective Stories: Japanese mystery novels and TV shows often use the Koseki as a plot device. A detective might find a secret in someone's Koseki—perhaps an unknown sibling or a hidden divorce. Because it is so comprehensive, it is the ultimate source of "truth" in a story.

ニュース：政府は戸籍法の改正について議論しています。
(News: The government is debating the revision of the Family Register Act.)

You might also hear it in personal family discussions. For example, when an elderly relative passes away, the family will talk about Koseki no tetsuzuki (the procedures for the family register). In these moments, the word carries a sense of duty and finality. It’s also used when young adults decide to bunseki (split their register) to become independent, which is a symbolic step into adulthood for some.

祖父が亡くなったので、戸籍の手続きに行かなければなりません。
(My grandfather passed away, so I have to go and handle the family register procedures.)

In the workplace, particularly in Human Resources (HR), Koseki may be mentioned during the hiring process for certain sensitive positions, though this is heavily regulated to prevent discrimination. HR might ask for a Juminhyo (residence certificate) instead, as it is less intrusive than a Koseki. However, for things like health insurance for dependents or survivor benefits, the Koseki remains the gold standard of proof.

人事部から、家族関係を証明するために戸籍謄本を出すように言われた。
(The HR department told me to submit a full copy of my family register to prove my family relationships.)

Even in pop culture, like anime or manga, you'll see characters talking about their Koseki. A character might find out they were adopted by seeing a note in their Koseki, leading to a dramatic revelation. It’s a powerful narrative tool because in Japan, your identity is not just who you say you are, but what is written in that official ledger.

ドラマの主人公は、自分の戸籍を見て、本当の両親を知った。
(The protagonist of the drama looked at his family register and learned who his real parents were.)

「早く戸籍を入れよう」と彼はプロポーズした。
("Let's get registered soon," he said as a proposal.)

When learning about the Japanese administrative system, it is very easy to confuse 戸籍 (Koseki) with other similar terms. Misusing these words can lead to confusion at city offices or in legal conversations. Here are the most common pitfalls.

Confusing Koseki with Juminhyo: The most common mistake is confusing 戸籍 (Koseki) with 住民票 (Juminhyo). A Juminhyo is a "Residency Certificate" that shows where you currently live. A Koseki shows who your family is. Foreigners in Japan have a Juminhyo but do NOT have a Koseki (unless they naturalize). If a bank asks for proof of address, you need a Juminhyo, not a Koseki.
Misusing "Nyuseki" (入籍): People often say nyuseki to mean "getting married." However, technically, nyuseki means entering an existing register. When two Japanese people marry, they usually create a new register, which is actually shinkoseki hensei. While nyuseki is commonly used in casual speech, it's technically inaccurate for most first marriages.
Assuming Foreigners have a Koseki: Foreign residents often mistakenly think they need to "create a Koseki" when they marry a Japanese person. In reality, the Japanese spouse remains the head of the Koseki, and the foreign spouse's name is simply added as a note in the description field. The foreigner does not become a member of the Koseki in the same way a citizen does.

❌ 戸籍を住所変更した。
✅ 住民票の住所変更をした。
(Correction: You change the address on your residency certificate, not your family register.)

Another mistake involves the distinction between Tohon and Shohon. If you are asked for a Tohon (full copy) and you bring a Shohon (partial extract), your application will likely be rejected. The Tohon contains everyone in the family, while the Shohon only contains one person. Always double-check which one is required for your specific purpose.

❌ 戸籍謄本が必要なのに、抄本を持ってきてしまった。
(Mistake: I needed the full copy but brought the extract by mistake.)

Furthermore, beginners sometimes confuse Koseki with Kakeibo (household account book) because they both start with "Ka/Ko" and deal with the house. However, Kakeibo is for money, while Koseki is for people. Similarly, don't confuse it with Kokuseki (nationality). While your Koseki proves your Kokuseki, they are distinct concepts. You can lose your Japanese nationality, but your Koseki record will still exist as a Joseki-tohon (removed register).

❌ 私はアメリカの戸籍を持っています。
✅ 私はアメリカの国籍を持っています。
(Correction: You have American nationality, not an American family register.)

Finally, avoid using Koseki in very casual or romantic ways unless you are specifically talking about the legal act of marriage. Saying "Let's put our Koseki together" is a very heavy, formal way to propose. It’s effective, but it sounds like you’re proposing with a lawyer present!

❌ 友達の戸籍はどこですか？
✅ 友達の家はどこですか？
(Correction: Ask where a friend's house is, not where their family register is, unless you are a private investigator.)

While 戸籍 (Koseki) is a specific legal term, there are several related words that describe family, residency, or identity. Understanding the differences will help you choose the right word for the right situation.

住民票 (Juminhyo): Difference: Residency Certificate. It tracks where you live now. Koseki tracks your lineage. In daily life, Juminhyo is used much more often for things like opening a bank account or signing a cell phone contract.
国籍 (Kokuseki): Difference: Nationality. While a Koseki is proof of Japanese nationality, Kokuseki is the abstract concept of being a citizen of a country. You would say "I have Japanese Kokuseki," not "I have Japanese Koseki" (though the latter implies the former).
家系 (Kakei): Difference: Family lineage or genealogy. This is a non-legal term used when talking about your ancestors or family tree in a social or historical context. Koseki is the legal document; Kakei is the biological/historical reality.
世帯 (Setai): Difference: Household. A Setai refers to the group of people living together and sharing expenses. A Koseki can span multiple households (e.g., adult children living away). You'll see Setai-nushi (Head of Household) on forms.

彼は有名な武士の家系に生まれた。
(He was born into a famous samurai lineage.)

When you need to provide proof of your family status but you aren't Japanese, the term Kazoku-kankei-shomeisho (Family Relationship Certificate) is the neutral alternative. For example, a Korean citizen in Japan would use this term to describe their equivalent document. In English-speaking countries, the equivalent is usually a combination of a "Birth Certificate" and a "Marriage Certificate." Japan's Koseki is unique because it combines all of these into one living document.

今の世帯には、私と妻と猫がいます。
(In my current household, there is me, my wife, and a cat.)

Another related term is Honseki (本籍), which refers to the specific location where the Koseki is registered. While Koseki is the record itself, Honseki is the place. You might be asked, "Where is your Honseki?" This is a common question on official forms. Additionally, My Number (the Social Security and Tax Number System) is a newer alternative for identification, but it has not replaced the Koseki for matters of lineage and family law.

書類に本籍地を記入してください。
(Please fill in your registered domicile on the form.)

In summary, if you are talking about family roots, use Kakei. If you are talking about where you live, use Juminhyo. If you are talking about the legal document of your family unit, use Koseki. Choosing the correct term shows a high level of cultural and linguistic competence.

日本には戸籍がありますが、アメリカにはありません。
(Japan has a family register system, but the US does not.)

How Formal Is It?

Fun Fact

The oldest surviving Koseki records in Japan date back to the year 702, known as the Taiho Koseki.

Pronunciation Guide

UK /koʊˈsɛki/

US /koʊˈsɛki/

The stress is relatively flat in Japanese, but in English loanword usage, it often falls on the second syllable 'se'.

Difficulty Rating

Reading 3/5

The kanji are common but the context is specialized.

Writing 4/5

Writing '籍' requires attention to stroke order.

Speaking 2/5

Easy to pronounce and commonly used.

Listening 3/5

Sounds similar to other 'seki' words (e.g., seki - seat).

What to Learn Next

Prerequisites

家族 (Kazoku) 役所 (Yakusho) 結婚 (Kekkon) 名前 (Namae) 書類 (Shorui)

Learn Next

住民票 (Juminhyo) 印鑑証明 (Inkan-shomei) 委任状 (Ininjo) 筆頭者 (Hittosha) 本籍 (Honseki)

Advanced

民法 (Minpo) 改正 (Kaisei) 嫡出子 (Chakushushi) 帰化 (Kika) 受理 (Juri)

Grammar to Know

Nouns with ~上 (jyo)

戸籍上の手続き (Administrative procedures on the register).

Compound Nouns (Noun + Noun)

戸籍謄本 (Koseki + Tohon).

Passive Voice with ~される

名前が戸籍に記載される (The name is recorded in the register).

Transitive Verbs (~を抜く/入れる)

戸籍を抜く (To remove from the register).

Conditional ~ば (If)

戸籍を調べればわかります (If you check the register, you'll know).

Examples by Level

これは私の家族の戸籍です。

This is my family's register.

Uses the basic 'A is B' (desu) structure.

戸籍は役所にあります。

The family register is at the city office.

Uses 'ni arimasu' to show location.

戸籍の名前を見ます。

I look at the names on the family register.

Simple object-verb structure.

お父さんとお母さんの戸籍です。

It is my father and mother's family register.

Uses 'to' to join nouns.

戸籍をください。

Please give me the family register.

Uses 'o kudasai' for a request.

新しい戸籍を作ります。

I will make a new family register.

Uses the future/habitual form of 'tsukuru'.

戸籍は大事な紙です。

The family register is an important paper.

Uses the adjective 'daiji-na'.

どこで戸籍を取りますか？

Where do I get the family register?

Question word 'doko' with particle 'de'.

パスポートのために、戸籍が必要です。

I need a family register for a passport.

Uses 'tame ni' to show purpose.

役所で戸籍謄本を取りました。

I got a full copy of the family register at the city office.

Introduces the specific term 'Koseki Tohon'.

戸籍には私の誕生日が書いてあります。

My birthday is written in the family register.

Uses 'te arimasu' for a state resulting from an action.

結婚して、新しい戸籍に入りました。

I got married and entered a new family register.

Uses 'te' form to connect actions.

外国人は戸籍がありません。

Foreigners do not have a family register.

Uses 'ga arimasen' for non-existence.

戸籍のコピーを持ってきてください。

Please bring a copy of the family register.

Uses 'motte kite kudasai' (bring).

戸籍をチェックしてください。

Please check the family register.

Uses the loanword 'chekku' with 'suru'.

戸籍には家族全員の名前があります。

The family register has all family members' names.

Uses 'zen'in' to mean everyone.

戸籍を調べれば、家族の歴史がわかります。

If you check the family register, you can understand your family history.

Uses the conditional 'ba' form.

彼は入籍したことを友達に報告した。

He reported to his friends that he had registered his marriage.

Uses 'nyuseki' as a verb for marriage.

戸籍謄本と抄本の違いを教えてください。

Please tell me the difference between a full copy and an extract of the register.

Uses 'A to B no chigai'.

本籍地をどこにするか、妻と相談した。

I consulted with my wife about where to put our registered domicile.

Uses 'ka' for an embedded question.

戸籍の手続きは、少し時間がかかります。

The family register procedures take a little time.

Uses 'jikan ga kakaru'.

両親の戸籍から抜けて、独立した。

I left my parents' register and became independent.

Uses 'nukete' (leaving/removing).

戸籍に名前が載っていないと、困ります。

It's a problem if your name is not listed in the family register.

Uses 'to' for a natural consequence.

身分を証明するために、戸籍を使います。

We use the family register to prove our identity/status.

Uses 'mibun o shomei suru'.

日本の戸籍制度は、非常に厳格に運用されている。

The Japanese family register system is operated very strictly.

Uses the passive 'un'yo sarete iru'.

戸籍上の氏名と、旧姓を併記することができる。

It is possible to list both the name on the family register and the maiden name.

Uses 'heiki suru' (write together).

相続の手続きには、亡くなった方の全戸籍が必要です。

For inheritance procedures, all family registers of the deceased are required.

Refers to tracing the full history for inheritance.

彼女は分籍届を出して、新しい戸籍を作った。

She submitted a notification of register separation and created a new one.

Uses 'bunseki-todoke' (separation notice).

戸籍法が改正されれば、夫婦別姓が可能になるかもしれない。

If the Family Register Act is revised, separate surnames for couples might become possible.

Uses the conditional 'ba' with 'kanou ni naru'.

戸籍をたどっていくと、先祖がどこに住んでいたかわかる。

By tracing the family register, you can find out where your ancestors lived.

Uses 'te iku' to show a continuing action.

養子縁組をすると、戸籍にその旨が記載される。

When an adoption occurs, that fact is recorded in the family register.

Uses 'sono mune' (to that effect).

戸籍の附票には、これまでの住所の履歴が載っている。

The supplementary family register record contains a history of previous addresses.

Introduces 'Koseki no fuhyo'.

戸籍制度の存廃については、多方面から議論がなされている。

There are arguments from various sides regarding the abolition or retention of the family register system.

Uses 'sonpai' (existence or abolition).

事実婚の場合、戸籍上は「未婚」のままとなる。

In the case of a common-law marriage, the status remains 'unmarried' on the family register.

Uses 'jijitsukon' and 'koseki-jyo'.

戸籍を遡って調査することで、相続人の範囲を確定させる。

By investigating back through the family registers, the scope of heirs is determined.

Uses 'sakanobotte' (going back in time).

無戸籍児の問題は、基本的人権の観点から深刻視されている。

The problem of children without a family register is viewed seriously from the perspective of basic human rights.

Uses 'shinkoku-shi sareru' (viewed as serious).

戸籍謄本は、日本の公的証明書として国際的にも認知されている。

The full copy of the family register is internationally recognized as a Japanese official certificate.

Uses 'ninchi sarete iru'.

離婚後三百日以内に生まれた子は、前夫の戸籍に入ると定められている。

It is stipulated that a child born within 300 days of a divorce enters the former husband's register.

Refers to the controversial '300-day rule'.

戸籍の電子化により、事務手続きの効率化が進んでいる。

The digitization of family registers is leading to more efficient administrative procedures.

Uses 'denshi-ka' (digitization).

戸籍には、個人のプライバシーに関わる繊細な情報が含まれている。

The family register contains sensitive information related to individual privacy.

Uses 'sensai-na' (sensitive/delicate).

戸籍制度は、明治国家が国民を把握・管理するための装置として機能してきた。

The family register system has functioned as a device for the Meiji state to grasp and manage its citizens.

Uses 'sochi' (device/mechanism) metaphorically.

選択的夫婦別姓の導入は、戸籍の単一世帯原則を揺るがす可能性がある。

The introduction of optional separate surnames for couples could potentially shake the single-household principle of the family register.

Uses 'yurugasu' (to shake/destabilize).

戸籍の記載内容が、就職や結婚における差別の温床となった歴史的経緯がある。

There is a historical background where the contents of the family register became a hotbed for discrimination in employment and marriage.

Uses 'onsho' (hotbed/breeding ground).

現行の戸籍制度は、多様化する家族の形態に十分に対応できているとは言い難い。

It is difficult to say that the current family register system is sufficiently capable of handling diversifying family forms.

Uses 'ii-gatai' (hard to say).

戸籍謄本の翻訳には、日本の法制度に関する深い知識が不可欠である。

Deep knowledge of the Japanese legal system is indispensable for translating family register copies.

Uses 'fukaketsu' (indispensable).

性別適合手術を受けた者は、戸籍上の性別を変更することが認められている。

Those who have undergone gender reassignment surgery are permitted to change their gender on the family register.

Legal terminology for gender changes.

戸籍は単なる行政記録を超え、日本人の血縁意識を規定する文化的象徴でもある。

The family register goes beyond simple administrative records; it is also a cultural symbol that defines the Japanese sense of kinship.

Uses 'koe' (exceed/go beyond).

デジタル・トランスフォーメーションの中で、戸籍のあり方も再定義を迫られている。

Amidst digital transformation, the nature of the family register is being forced into redefinition.

Uses 'saiteigi o semararete iru'.

Common Collocations

戸籍に入れる

戸籍を抜く

戸籍謄本を取る

戸籍上の名前

戸籍を調べる

戸籍を移す

戸籍に載る

戸籍の附票

戸籍係

戸籍法

Common Phrases

籍を入れる

— Literally 'to put in the register,' this is the most common way to say 'to get married' officially.

来月、籍を入れることになりました。

戸籍謄本

— The full certified copy of the family register.

戸籍謄本を一部お願いします。

戸籍抄本

— A certified extract of the family register for one person.

抄本でも大丈夫ですか？

本籍地

— The official place of registration for the family register.

本籍地を忘れてしまいました。

筆頭者

— The head of the family register (the first person listed).

戸籍の筆頭者は誰ですか？

除籍謄本

— A copy of a family register that has been closed (e.g., after everyone moved or died).

古い情報を調べるために除籍謄本を取った。

分籍届

— The official form to separate oneself from a family register.

分籍届を提出した。

戸籍上の夫婦

— A couple who are legally married according to the register.

彼らは戸籍上の夫婦です。

戸籍の編製

— The creation or compilation of a family register.

結婚により新しい戸籍が編製された。

戸籍訂正

— The correction of an error in the family register.

名前の間違いを戸籍訂正した。

Often Confused With

戸籍 vs 住民票 (Juminhyo)

Juminhyo is for current address; Koseki is for family history.

戸籍 vs 国籍 (Kokuseki)

Kokuseki is the concept of nationality; Koseki is the document proving it.

戸籍 vs 世帯 (Setai)

Setai is the group living together; Koseki is the legal family unit.

Idioms & Expressions

"戸籍に傷がつく"

— To have a 'flaw' on one's family register, usually referring to divorce or criminal records in a traditional sense.

離婚すると戸籍に傷がつくと親に言われた。

Old-fashioned

"籍を置く"

— To be registered or belong to an organization (not just limited to family).

彼はその大学に籍を置いている。

Neutral

"籍を外す"

— To remove oneself from a register, often implying leaving an organization or a family.

彼はチームから籍を外した。

Neutral

"バツ一"

— Meaning 'one X,' referring to the 'X' mark traditionally put on a register when someone divorces.

彼はバツ一だが、とても優しい。

Informal

"戸籍を洗う"

— To thoroughly investigate someone's background or lineage (often used in detective contexts).

警察は容疑者の戸籍を洗った。

Neutral

"籍を抜く"

— To officially leave a family unit, usually through divorce or adoption changes.

彼女は実家の戸籍を抜いて、夫の籍に入った。

Neutral

"戸籍のない子"

— A child without a family register; a metaphor for being forgotten or unrecognized by society.

戸籍のない子の救済が急務だ。

Serious

"籍を同じくする"

— To be in the same family register; to be family members.

私たちは籍を同じくする兄弟です。

Formal

"戸籍を汚す"

— To bring shame to the family name (similar to 'kizu ga tsuku').

戸籍を汚すような真似はするな。

Formal/Old-fashioned

"籍を移す"

— To move one's registration to a different location or family.

養子に入って籍を移した。

Neutral

Easily Confused

戸籍 vs 籍 (Seki)

It is a part of Koseki but can mean many types of registers.

Koseki is specifically the family register, while Seki is a general term for any register (school, club, etc.).

彼は大学に籍を置いている。

戸籍 vs 本籍 (Honseki)

Sounds similar and is related to Koseki.

Honseki is the 'place' of registration, while Koseki is the 'record' itself.

本籍地はどこですか？

戸籍 vs 国籍 (Kokuseki)

Both deal with identity and citizenship.

Kokuseki is your status as a citizen of a nation; Koseki is the internal Japanese document.

日本国籍を持っています。

戸籍 vs 除籍 (Joseki)

Contains the 'seki' kanji.

Joseki means being removed from a register, whereas Koseki is the register itself.

彼は戸籍から除籍された。

戸籍 vs 学籍 (Gakuseki)

Contains the 'seki' kanji.

Gakuseki is a student register, nothing to do with family.

学籍番号を教えてください。

Sentence Patterns

[Name] no koseki desu.

Tanaka-san no koseki desu.

[Purpose] no tame ni, koseki ga hitsuyo desu.

Kekkon no tame ni, koseki ga hitsuyo desu.

[Place] de koseki o toru.

Shiyakusho de koseki o toru.

Koseki ni [Person] o ireru.

Koseki ni kodomo o ireru.

Koseki-jyo, [Status] desu.

Koseki-jyo, fufu desu.

Koseki o sakanobotte [Action].

Koseki o sakanobotte kakei o shiraberu.

Koseki ni [Fact] ga kisai sareru.

Koseki ni rikon ga kisai sareru.

Koseki-ho no kaisei ni tomonai [Result].

Koseki-ho no kaisei ni tomonai un'yo ga kawaru.

Word Family

Nouns

戸籍 (Koseki - Family register)

国籍 (Kokuseki - Nationality)

学籍 (Gakuseki - School registration)

除籍 (Joseki - Removal from register)

分籍 (Bunseki - Register separation)

Verbs

入籍する (Nyuseki suru - To register a marriage)

除籍する (Joseki suru - To remove from a register)

復籍する (Fukuseki suru - To return to a former register)

住民票 (Juminhyo)

世帯 (Setai)

本籍 (Honseki)

筆頭者 (Hittosha)

戸籍謄本 (Koseki Tohon)

How to Use It

frequency

Common in administrative and life-event contexts.

Common Mistakes

Using 'Koseki' to mean 'Nationality'. → Using 'Kokuseki' for nationality.
While they are related, 'Koseki' is the document and 'Kokuseki' is the legal status. You don't 'have' a Koseki in the same way you 'have' a nationality.
Asking for a 'Koseki' at the wrong city hall. → Going to the city hall of your 'Honseki' (registered domicile).
Your Koseki is not kept where you live, but where it was originally registered. This is a common source of frustration for Japanese people who move far from home.
Confusing 'Koseki' with 'Juminhyo' for address proof. → Using 'Juminhyo' for proof of address.
The Koseki does not list your current address. If a bank wants to know where you live, they need a Juminhyo.
Saying 'Nyuseki' when a foreigner marries a Japanese person. → Saying 'Kekkon shita' (Got married).
Technically, a foreigner cannot 'nyuseki' because they cannot be a member of a Koseki. Their name is just written in the margin.
Thinking 'Koseki' is just for the nuclear family. → Understanding it can include grandparents or grandchildren in some older formats.
While modern registers are nuclear, older 'Kaisei-hara-koseki' can be very large and include multiple generations.

Tips

Using 'Seki' as a suffix

Remember that 'seki' (籍) often appears at the end of words related to registration, like 'kokuseki' (nationality) or 'gakuseki' (student status). This helps you identify administrative words easily.

The 'Nyuseki' Proposal

Proposing by saying 'Let's enter the register' (籍を入れよう) is considered very serious and traditional. It implies a deep commitment to the family unit, not just the individual.

Convenience Store Printing

If you have a 'My Number' card, you can often print your Koseki documents at a convenience store, saving you a trip to the city hall. Check if your municipality supports this!

Inheritance Tracing

To prove you are an heir, you often need to 'sakanoboru' (go back) through several registers to show the complete family connection. This is a common task for lawyers.

Tohon vs. Shohon

Memorize 'To' (謄) as 'Total' (the whole family) and 'Sho' (抄) as 'Small/Single' (just you) to remember which document is which.

Privacy Matters

In Japan, asking to see someone's Koseki is very intrusive. It is usually only done for legal reasons or by very traditional families before a marriage.

The 'Door' Kanji

The kanji '戸' (door) represents the household. This reminds you that the Koseki is a record of 'houses,' not just people.

Don't say 'My Koseki'

In Japanese, you usually say 'My family's Koseki' (kazoku no koseki) or 'the register I'm in' because the document belongs to the unit, not the individual.

Read News about Surnames

Reading about the 'Fufu Bessei' debate is a great way to see the word 'Koseki' used in high-level, real-world discussions about society.

Beyond 'Family Register'

When translating to English, 'Family Register' is standard, but in some legal contexts, 'Civil Registry' might be more appropriate to convey its official weight.

Memorize It

Mnemonic

Think of 'KO' as a 'COmpany' of family members, and 'SEKI' as their 'SECtion' in the government's big book.

Visual Association

Imagine a traditional Japanese sliding door (戸) with a large book (籍) sitting behind it, containing your family's names.

Word Web

Family Marriage Birth Death Government Lineage Paperwork Identity

Challenge

Try to explain to a friend in Japanese why you need a 'Koseki Tohon' to get a passport.

Word Origin

The term comes from the combination of 'Ko' (戸), meaning 'door' or 'household', and 'Seki' (籍), meaning 'record' or 'registry'. It was established in its modern form during the Meiji era.

Original meaning: A record of households for the purpose of taxation and social order.

Sino-Japanese (Kango).

Cultural Context

Be careful when discussing Koseki with people who might have complex family backgrounds, as it can reveal adoption or divorce history.

English-speaking countries typically use separate birth, marriage, and death certificates rather than a unified family register.

The '300-day rule' in the Koseki Law is a frequent topic in Japanese legal dramas. The movie 'A Man' (Aru Otoko) explores the mystery of Koseki identity theft. News reports on 'Sentakuteki Fufu Bessei' (separate surnames).

Practice in Real Life

Real-World Contexts

Passport Application

戸籍謄本が必要です
発行から三ヶ月以内
本籍地を記入する
抄本でもいいですか？

Marriage Registration

婚姻届を出す
籍を入れる
新しい戸籍を作る
入籍日

Inheritance

相続人を調べる
戸籍を遡る
除籍謄本を取る
法定相続分

Moving/Relocation

本籍地を変える
転籍届
住民票を移す
役所の窓口

Naturalization

帰化申請
戸籍を編製する
日本国籍を取得する
身分事項

Conversation Starters

"戸籍謄本って、どこで取れるか知ってる？"

"結婚したら、すぐに籍を入れるつもり？"

"パスポートの更新に、戸籍が必要なんだって。"

"自分の本籍地がどこか、知ってる？"

"家系図を作るために、戸籍を調べてるんだ。"

Journal Prompts

今日、役所に行って戸籍謄本を取ってきた時の感想を書きなさい。

日本の戸籍制度について、どう思いますか？自分の国のシステムと比較して書きなさい。

もし自分が新しい戸籍を作るなら、どこを本籍地にしたいですか？その理由も書きなさい。

「籍を入れる」という言葉を使って、結婚についての考えを書きなさい。

家族の歴史を知るために、戸籍を調べることの重要性について書きなさい。

Frequently Asked Questions

10 questions

No, only Japanese citizens can have their own Koseki. Foreigners are listed as a note on their Japanese spouse's or child's Koseki, but they do not have a register of their own unless they naturalize as Japanese citizens.

A Koseki Tohon (戸籍謄本) is a complete copy of the entire family register, including all members. A Koseki Shohon (戸籍抄本) is an extract that only includes the information for one specific person. Most official applications specify which one is needed.

You must request it from the municipal office (city hall) where your 'Honseki' (registered domicile) is located. This might be different from where you currently live. Many offices now allow you to request it by mail or at convenience stores with a My Number card.

No, the Koseki itself does not show address history. For that, you need a document called 'Koseki no Fuhyo' (戸籍の附票), which is a supplementary record of all addresses you have lived at since you entered that specific register.

Literally meaning 'entering the register,' it historically referred to a wife entering her husband's family register. Today, most couples create a new register together, but the term 'nyuseki' remains the standard casual way to say 'we got legally married.'

It has been criticized for being patriarchal (requiring a single surname) and for its history of being used to identify marginalized groups like the Burakumin. However, modern privacy laws have strictly limited who can access someone else's Koseki.

When a death is reported, that person's name is 'removed' (joseki) from the register with a mark. If everyone in a register dies or moves out, it becomes a 'Joseki-tohon' (removed register copy), which is kept for 150 years.

Yes, you can move your registered domicile (Honseki-chi) to any existing address in Japan by filing a 'Tenseki-todoke' (notification of transfer). Some people choose famous locations like the Imperial Palace.

The Hittosha (筆頭者) is the head of the register, usually the person whose surname the family uses. When searching for a register at the city hall, you must provide the Hittosha's name and the Honseki-chi.

Most institutions, like the passport office or banks, require a copy issued within the last three or six months to ensure the information is up to date.