How to say "logical" in Japanese

• 論理的ろんりてきCommon
  na-adjectiveCovers 'logical' in its core sense — thinking, arguments, or explanations that follow the rules of logic and are internally consistent. Typical of discussion of reasoning, debate, or analysis.
  人間にんげんだけに論理的ろんりてき思考力しこうりょくがある。↗

  Man alone has the ability to reason.
• 合理的ごうりてきCommon
  na-adjectivePrimarily 'rational' or 'reasonable'; when it matches 'logical', the sense is sensible and well-founded — a logical choice, decision, or conclusion — rather than reasoning that follows the rules of logic.
  彼女かのじょの思考法しこうほうは合理的ごうりてきだった。↗

  Her way of thinking was rational.

Choose 論理的 when 'logical' refers to reasoning, arguments, or explanations that follow the rules of logic; choose 合理的 when 'logical' means rational or sensible — a reasonable, well-founded choice rather than strict logic.

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

• 論理的ろんりてきlogical
• 合理的ごうりてきrational
• ロジカルlogical
• 理路整然りろせいぜんlogical
• 筋の通ったすじのとおったrational
• 筋道の通ったすじみちのとおったself-consistent (e.g. with one's morals)