拘留

The term 拘留 (こうりゅう - Kouryuu) is a specialized legal noun in Japanese that refers to a specific type of short-term criminal punishment or administrative detention. In the context of the Japanese Penal Code, specifically Article 16, it is defined as the incarceration of a person in a detention house for a period of at least one day but less than thirty days. Unlike heavier prison sentences (懲役 - choueki) which involve forced labor, or imprisonment (禁錮 - kinko) which does not, kouryuu is characterized by its brevity and is typically applied to minor offenses or as a preliminary step in legal proceedings. It is essential to understand that while the word sounds identical to 勾留 (also pronounced kouryuu), the latter refers to pre-trial detention during an investigation, whereas the former (the one we are discussing) is a formal penalty.

Legal Status

A criminal penalty involving short-term loss of physical liberty.

Duration

Typically 1 to 29 days.

Facility

Served in a detention center (拘置所) or a substitute prison (police station cell).

Historically, the concept of 拘留 has evolved from early Meiji-era legal reforms influenced by European civil law. It serves as a middle ground between a simple fine (科料) and long-term imprisonment. In modern society, you might see this word in news reports regarding petty crimes, public order violations, or minor theft. It carries a heavy social weight despite its short duration, as it results in a criminal record (前科). For a learner, recognizing the kanji 拘 (to seize/arrest) and 留 (to stay/detain) helps in visualizing the act of being held in a specific location against one's will by legal authority.

Common Usage

Frequently used in passive form (拘留される - to be detained).

Social Context

Associated with police activity and the justice system.

Furthermore, the word is often used in broader, non-legal contexts to describe any situation where someone is held back or delayed, though this is less common than its legal application. In literature, it might be used metaphorically to describe a character feeling 'detained' by their past or by a specific location. However, for 99% of your Japanese interactions, treat this as a 'Police/Law' word. Understanding this word allows you to navigate Japanese news broadcasts and crime novels with much greater clarity, as the distinction between being 'arrested' (逮捕), 'detained' (拘留), and 'imprisoned' (刑務所に入る) is vital to the plot and legal reality.

Using 拘留 correctly requires an understanding of its grammatical function as a Suru-noun (サ変動詞). While it is a noun, it frequently combines with the verb 'suru' (to do) to form 拘留する (to detain) or, more commonly, the passive 拘留される (to be detained). Because it is a formal term, it is rarely used in the first person unless one is a police officer or a lawyer describing an action. Most learners will encounter it in the third person: 'The suspect was detained' (容疑者が拘留された).

Grammar Pattern 1

[Subject] + を + [Time Period] + 拘留する (Detain [Subject] for [Time])

Grammar Pattern 2

[Subject] + は + 拘留中だ (Subject is currently in detention)

When discussing the duration of detention, the time period usually precedes the word. For example, '10-day detention' is 10日間の拘留. It is also important to note the particles used. One is detained 'at' a place using the particle に or で depending on the focus: 警察署に拘留される (detained at the police station). In formal writing, you will see it paired with legal verbs like 執行する (shikkou - to execute/carry out) or 言い渡す (iiwatasu - to sentence/pronounce).

In terms of register, this word belongs strictly to formal, written, or professional spoken Japanese. If you are watching a detective drama (keiji dorama), the characters will use this word constantly. However, if you are talking to a friend about being held up at a meeting, using 拘留 would be a humorous hyperbole at best, and a confusing mistake at worst. The word carries the 'smell' of the law, handcuffs, and sterile interrogation rooms. It is a 'hard' word (kango) consisting of two kanji with Chinese roots, which naturally gives it a more serious tone than native Japanese (yamato kotoba) equivalents.

Collocation

拘留を解く (kouryuu o toku) - To release from detention.

Collocation

拘留状 (kouryuujou) - A detention warrant.

Finally, consider the psychological weight. In Japan, being 'detained' even for a short period can have significant social consequences. Therefore, the word is used with gravity. When writing an essay about social justice or legal systems in Japanese, 拘留 is the precise term you need to describe the state of being held by the government. It is more specific than 拘束 (kousoku - restraint/restriction), which can apply to physical ties or even time constraints (e.g., being 'tied up' with work).

The most common place to encounter 拘留 is in the mass media. Japanese news programs (ニュース番組) are highly standardized in their vocabulary. When a person is caught for a minor crime like shoplifting (万引き) or a minor traffic violation that escalates, the reporter will often state that the individual is being 'detained.' You will see the kanji scrolling across the bottom of the screen in 'breaking news' (速報) tickers. It is a staple of the 'Social' (社会) section of newspapers like the Asahi Shimbun or Yomiuri Shimbun.

Media Type

TV News, Newspapers, Legal Journals.

Entertainment

Crime novels (推理小説), Police procedurals, Courtroom dramas.

Another significant venue is the Japanese legal system itself. If you were to visit a court (裁判所) or read a legal transcript, 拘留 would appear as a technical term for a specific category of punishment. It is also used in international contexts, such as when the Japanese government discusses the 'detention' of foreign nationals for visa violations, although 収容 (shuuyou) is more common in immigration contexts. In detective fiction, such as the works of Keigo Higashino, the tension often revolves around the 'detention period' and whether the police can find enough evidence before they have to release the suspect.

In academic settings, particularly in law or sociology departments, professors will use 拘留 to discuss human rights, the penal system, and the history of Japanese law. Students are expected to distinguish it from 逮捕 (arrest) and 勾留 (pre-trial detention). If you are preparing for the JLPT N1 or the Kanji Kentei, you will find this word in the context of formal documents and high-level reading passages. It is not a word you will hear at a grocery store or a cafe, but it is a word that defines the boundaries of public order in Japan.

Frequency

High in formal/legal media; Zero in casual daily life.

Associations

Police, Handcuffs, Interrogation, Law, Court.

The number one mistake made by both Japanese learners and even native speakers is confusing 拘留 with 勾留. Both are pronounced 'kouryuu.' However, they are legally distinct. 拘留 (the one with the 'hand' radical 扌) is a **punishment** (penalty) for a crime. 勾留 (the one with the 'hook' radical 勾) is a **procedural step** where a suspect is held during an investigation before a trial. Using the wrong kanji in a formal report or an exam is a significant error.

Mistake 1

Confusing 拘留 (punishment) with 勾留 (investigative holding).

Mistake 2

Using it for non-legal delays (e.g., 'I was detained by traffic').

Another common mistake is the confusion between 拘留 and 逮捕 (taiho - arrest). While they are related, they are not the same. An arrest is the initial act of taking someone into custody. Detention (拘留) is the state of being kept there. You can be arrested without being sentenced to detention, and you can be in detention long after the initial arrest. Learners often use 'arrest' when they mean 'detention' and vice versa. In Japanese, 'arrest' is the action of catching, while 'detention' is the state of being held.

Finally, learners sometimes mispronounce the word as 'koryu' or 'kouryu'. Ensure the 'ou' is a long vowel (こう) and the 'ryuu' is also a long vowel (りゅう). Shortening these vowels can change the meaning or make the word unintelligible. Also, avoid using the word in polite social settings to describe being 'busy.' Saying 'I am in detention with work' (仕事で拘留されている) sounds like you are literally a prisoner of your company, which might be a funny joke but is technically a misuse of the term's legal weight.

To truly master 拘留, you must understand its neighbors in the 'legal custody' family. The most frequent companion is 逮捕 (Taiho). While 拘留 is the state of being held, 逮捕 is the specific legal act of seizing a suspect. In a typical sequence, a person is 'arrested' (逮捕), then 'detained' (勾留/拘留) for questioning or as punishment. If you are writing a story, you would use 逮捕 for the 'cops chasing the thief' scene and 拘留 for the 'thief sitting in a cell' scene.

逮捕 (Taiho)

Arrest; the physical act of taking someone into custody.

拘束 (Kousoku)

Restraint; can be physical (handcuffs) or metaphorical (time).

監禁 (Kankin)

Confinement; often used for illegal acts like kidnapping.

Another important distinction is 留置 (Ryuuchi). This word is often used in the term 留置場 (ryuuchijo), which is the jail cell inside a police station. While 拘留 is the legal term for the punishment/state, 留置 is often used to describe the physical act of keeping someone in that specific police cell. Then there is 収容 (Shuuyou), which means 'accommodation' or 'internment.' This is used for larger groups, such as in immigration centers (入管収容所) or medical facilities, and lacks the specific 'criminal punishment' nuance of 拘留.

Lastly, consider 禁錮 (Kinko) and 懲役 (Choueki). These are the 'big brothers' of 拘留. 拘留 is the lightest form of incarceration (under 30 days). 禁錮 is imprisonment without labor, and 懲役 is imprisonment with forced labor. Understanding this hierarchy is essential for reading Japanese news about sentencing. If a judge says '拘留,' the crime was minor. If they say '懲役,' the crime was serious. This vocabulary web helps you categorize the severity of events in Japanese society.