How to say "regulation" in Japanese

• 調整ちょうせいJLPT N2approx.Common
  noun, suru verb, transitive verbCovers 'regulation' in the sense of adjustment or fine-tuning — bringing things into balance or coordinating them, such as regulating timing, levels, or positions between parties. It is not the word for official rules.
  シートを自分じぶんに合あうように調整ちょうせいしてください。↗

  Please adjust the seat to fit you.
• 規制きせいJLPT N1approx.Common
  noun, suru verb, transitive verbThe usual word for regulation as control or restriction imposed by authorities — government regulation of industries, traffic policing, or limits on activity. Choose this when 'regulation' means official rules restricting what people may do.
  交通こうつう規制きせいには従したがわないといけない。↗

  We should obey the traffic rules.
• 調節ちょうせつJLPT N2approx.Common
  noun, suru verb, transitive verbCovers 'regulation' as adjustment or control of a machine, temperature, or condition to keep it at a suitable level. Like 調整, it is about fine-tuning rather than rules, with more emphasis on keeping something within proper limits.
  このつまみを回まわすことでテレビの色いろを調節ちょうせつできます。↗

  You can adjust the color on the TV by turning this knob.
• 統制とうせいJLPT N1approx.Common
  noun, suru verb, transitive verbCovers 'regulation' as overall control or direction of activity, especially by an authority managing an economy, market, or public behavior. It suggests centralized control rather than fine-tuning or individual rules.
  その国くにでは政府せいふが物価ぶっかを統制とうせいしている。↗

  In that country the government controls prices.
• 規則きそくJLPT N4approx.Common
  nounCovers 'regulation' in the sense of a rule or set of rules — written regulations of an organization, school, or sport. Use this when 'regulation' refers to the rule itself rather than the act of controlling or adjusting.
  この規則きそくはあなたにも当あてはまる。↗

  This rule applies to you, too.

For rules imposed by authorities use 規制 or 規則; for controlling activity or supply use 統制; for fine-tuning or adjusting something use 調整 or 調節.

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

• 調整ちょうせいadjustment
• 規制きせいregulation
• 調節ちょうせつregulation
• 統制とうせいregulation
• 規則きそくrule
• 決まりきまりrule
• 定めさだめlaw
• 掟おきてlaw
• 整理せいりsorting
• 制せいsystem
• 規定きていstipulation
• 法令ほうれいstatute
• 法のりrule
• レギュレーションregulation
• 律りつlaw (esp. ancient East Asian criminal code)
• 法規制ほうきせいregulation
• 規整きせいregulation
• アジャストadjustment
• 典憲てんけんrule
• 守則しゅそくcode
• ルール化ルールかcodification (into rules)
• 変動率へんどうりつvolatility
• コードcode
• 加減かげんadjustment
• 憲法けんぽうrules
• 格かくrule
• 縛りしばりregulation
• 整調せいちょうregulation (of a piano)
• 条例じょうれい(local) regulation