The suffix -sei signifies a structured system, rule, or institutional framework.
Word in 30 Seconds
- Indicates a specific system or institutional framework.
- Commonly attached to nouns to describe rules or structures.
- Essential for explaining service conditions and organizational models.
Overview
- 1概要：「〜制」は、漢字の「制度」や「〜の仕組み」という意味を持つ接尾辞です。単独では使われず、必ず名詞の後ろに接続して、その対象がどのようなルールや構造で成り立っているかを表します。2) 使用パターン：主に「名詞＋制」の形で使われます。例えば「会員制」は「会員という仕組み（会員以外は入れない）」、「予約制」は「予約が必要な仕組み」を指します。また、「完全週休二日制」のように、より複雑な条件を表す場合にも多用されます。3) 一般的な文脈：ビジネス、公共サービス、教育現場などで頻繁に使われます。特に、サービスがどのような条件で提供されているかを説明する際（例：予約制、先着順制）に不可欠です。また、組織の形態（例：議院内閣制、学級担任制）を説明する際にも使われます。4) 類似語との比較：「〜式」と比較されることが多いです。「〜式」は「やり方・スタイル（例：日本式、筆記式）」を指すのに対し、「〜制」は「システム・制度（例：会員制、学年制）」を指します。ルールや組織の枠組みを強調する場合は「制」、やり方やデザインを強調する場合は「式」を選ぶのが適切です。
Examples
この店は完全予約制です。
everydayThis shop is by reservation only.
当社は週休二日制を採用しています。
formalOur company has a two-day weekend system.
会員制のジムに入会した。
informalI joined a members-only gym.
議院内閣制について学ぶ。
academicI am studying the parliamentary cabinet system.
Common Collocations
Common Phrases
完全予約制
By reservation only
週休二日制
Two-day weekend system
会員制
Members-only
Often Confused With
Refers to a method, style, or ceremony. Unlike 'sei' which is about the institutional system, 'shiki' is about the procedure or design.
Refers to nature, quality, or gender. It is an abstract noun suffix, not a system-based one.
Grammar Patterns
How to Use It
Usage Notes
The suffix -sei is highly formal and structural. It is used to define the boundaries or rules of a service or organization. Ensure the word preceding it is a noun that can realistically function as a governing rule.
Common Mistakes
Learners often use -sei for personal styles (like 'American style'), where -shiki is more appropriate. Also, avoid confusing the kanji '制' with '性' or '政', as they have completely different meanings.
Tips
Focus on the Systemic Meaning
Think of -sei as 'system' or 'policy'. It always implies that there is a set of rules governing the noun it attaches to.
Don't Confuse with -sei (Nature/Gender)
Be careful not to confuse this suffix with other 'sei' characters like 性 (nature/gender). Context is key to distinguishing them.
Common in Japanese Business Culture
Japanese society loves clear rules. Using -sei helps clarify expectations in professional and public environments.
Word Origin
The kanji 制 originates from the idea of cutting or regulating, leading to the meaning of 'system' or 'law'. It has been used in Japanese for centuries to denote organized structures.
Cultural Context
Japanese organizations value predictability and order. The widespread use of the -sei suffix reflects this cultural preference for clear, rule-based systems in everyday life.
Memory Tip
Think of the kanji 制 (sei) as a 'rule' or 'restriction'. Just like a 'system' restricts or defines how things work, 'sei' defines the system.
Frequently Asked Questions
4 questions「〜制」は制度やルールを指し、「〜式」はやり方や様式を指します。例えば「予約制」は予約というルール、「日本式」は日本のようなやり方という意味です。
いいえ、全ての言葉に付けられるわけではありません。制度として定着している概念や、特定のルールを持つものに対して使われるのが一般的です。
毎週必ず2日休みがあるという制度を意味します。ビジネスの労働条件を説明する際によく使われる表現です。
はい、「メンバー制」のようにカタカナ語に付くこともあります。ただし、日本語として定着しているものに限られます。
Test Yourself
このレストランは___なので、事前の連絡が必要です。
ルールや仕組みを表す場合は「制」を使います。
「会員制」の意味は？
会員という制度に基づいた運営を指します。
（制 / この / 会社 / 交代 / は / です）
「名詞＋制」の形が正解です。
Score: /3
Summary
The suffix -sei signifies a structured system, rule, or institutional framework.
- Indicates a specific system or institutional framework.
- Commonly attached to nouns to describe rules or structures.
- Essential for explaining service conditions and organizational models.
Focus on the Systemic Meaning
Think of -sei as 'system' or 'policy'. It always implies that there is a set of rules governing the noun it attaches to.
Don't Confuse with -sei (Nature/Gender)
Be careful not to confuse this suffix with other 'sei' characters like 性 (nature/gender). Context is key to distinguishing them.
Common in Japanese Business Culture
Japanese society loves clear rules. Using -sei helps clarify expectations in professional and public environments.
Examples
4 of 4この店は完全予約制です。
This shop is by reservation only.
当社は週休二日制を採用しています。
Our company has a two-day weekend system.
会員制のジムに入会した。
I joined a members-only gym.
議院内閣制について学ぶ。
I am studying the parliamentary cabinet system.
Related Content
This Word in Other Languages
Related Vocabulary
More general words
能力
A1Nouryoku refers to the mental or physical power, skill, or capacity required to perform a specific task or function. It can describe both innate talent and skills acquired through learning and practice.
異常
A1A word used to describe something that deviates from the normal state, standard, or expected pattern. It often implies a problem, malfunction, or an extraordinary occurrence that requires attention or investigation.
～について
A2About, concerning; indicates topic.
〜について
B1About, concerning; on the subject of.
～ぐらい
A2about, approximately
ぐらい
A2About; approximately; to the extent of.
ごろ
A2About, approximately (time).
うえ
A2At a higher position than.
絶対
B1Absolutely; definitely; never.
絶対に
B1Absolutely; definitely.
