How to say "cautious" in Japanese

• 慎重しんちょうJLPT N3approx.Common
  na-adjective, nounThe default word for 'cautious' in the sense of acting carefully and prudently rather than rushing into things. Typical in contexts like cautious investment, driving, or decision-making, where discretion matters more than fear.
  裁判官さいばんかんには慎重しんちょうさがなくてはならない。↗

  Discretion is proper to judges.
• 用心深いようじんぶかいCommon
  i-adjectiveCovers 'cautious' as wary and watchful, staying alert to possible danger or trouble. It describes a person's habitual vigilance — someone careful about strangers, suspicious situations, or things going wrong.
  なるほど彼かれは若わかいが、用よう心深こころふかい。↗

  Indeed he is young, but he is prudent.
• 注意深いちゅういぶかいCommon
  i-adjectiveLeans toward 'careful' or 'attentive': noticing details and avoiding mistakes rather than guarding against danger. Use it for cautious, meticulous work such as checking documents or performing precise tasks.

Choose 慎重 for general prudence and discretion in decisions and actions, 「用心深い」 for wariness toward danger, and 「注意深い」 for careful attentiveness to detail.

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

• 慎重しんちょうcareful
• 用心深いようじんぶかいcareful
• 注意深いちゅういぶかいattentive
• そつがないcautious
• そつのないcautious
• 慎み深いつつしみぶかいdiscreet
• 腫れ物に触るようはれものにさわるよう(very) cautious