習慣|しゅうかんshuukan[0]heiban (flat)

1. nounhabit
   彼かれはたばこを吸すう習慣しゅうかんをやめた。↗

   He got out of the habit of smoking.
2. noun(social) custom; practice; convention; tradition
   その習慣しゅうかんは中国ちゅうごくで始はじまった。↗

   The custom originated in China.

• Synonym習わしならわしWrittenWritten. A custom or practice handed down and kept up, by a person or society, as in 「古くからの習わし」; stresses what has come to be established by usage.
• Synonym慣習かんしゅうWrittenWritten. Conventions generally observed in society, as in 「商慣習」; covers collective practice rather than one person's habits.
• Synonym常習じょうしゅうWrittenWritten. Habitual repetition of something bad, as in 「遅刻の常習犯」; carries a negative judgement.
• Synonym習いならいNeutralA habit, or simply the way things go in the world, as in 「世の習い」; often said with a resigned, reflective tone.
• Synonym癖くせNeutralUnconscious personal habits, as in 「爪を噛む癖」.
• Synonym慣行かんこうWrittenWritten. Practices widely followed as a matter of course, as in 「商取引の慣行」.
• Synonym習俗しゅうぞくWrittenWritten. The customs of a place or people, as in 「日本の習俗」; has an academic flavour.
• Synonym習癖しゅうへきWrittenWritten. A personal bad habit, as in 「悪い習癖」.
• Related因習いんしゅうWrittenWritten. Outdated customs viewed as undesirable, as in 「因習を打破する」; pejorative.
• Related慣例かんれいWrittenWritten. Doing things the way they have always been done, as in 「慣例に従う」; used mostly for organizations.
• Related風習ふうしゅうWrittenWritten. Customs of a particular place, as in 「村の風習」.
• Related定例ていれいWrittenWritten. Held at fixed intervals, or an established precedent, as in 「定例会議」.
• Related恒例こうれいWrittenWritten. An event held as a matter of course, at a set time or by custom, as in 「恒例の行事」「毎年恒例」; centres on the event itself.
• Related決まりきまりNeutralA rule or convention, as in 「毎朝の決まり」.
• Related伝統でんとうNeutralTraditions handed down through the generations, as in 「伝統文化」.
• Related風俗ふうぞくWrittenWritten. The customs of an era or region, but in modern everyday use it usually means the sex industry — handle with care.
• RelatedパターンCasualColloquial loanword. A set pattern, as in 「いつものパターン」.
• RelatedしきたりWrittenWritten. Rules handed down within a family or local community, as in 「家のしきたり」.
• Related御定まりおさだまりCasualColloquial. The same old routine, as in 「お定まりのコース」; said with a teasing edge.
• Related俗習ぞくしゅうWrittenWritten. Folk customs; rare, and close to 「習俗」.
• Related旧習きゅうしゅうWrittenWritten. Old customs, as in 「旧習を改める」.
• Related古例これいWrittenWritten. Precedents from long ago; very rare.
• Related常例じょうれいWrittenWritten. The usual practice or convention; not often used.
• Related風儀ふうぎWrittenWritten. Customs and manners, or a family's ways, as in 「家の風儀」.

For habits and customs in general, 「習慣」 is the default. Use 「癖」 for personal little habits, 「慣習」 or 「慣例」 for social conventions, 「しきたり」 for family rules, 「風習」 for local customs, 「恒例」 for events held as a matter of course, and 「伝統」 for tradition.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 長ながい間あいだ繰り返くりかえし行おこなわれ、そうする事ことが決きまりになっていること。
2. ある国くに・地域ちいきで普通ふつうの事こととして行おこなわれていること。