How to say "activity" in Japanese

• 活動かつどうJLPT N3approx.Common
  noun, suru verb, intransitive verbThe default word for activity as the fact of being active or doing things, covering people, organizations, animals, and even natural phenomena such as volcanoes; also action or operation.
  テレビを見みることは受動的じゅどうてき活動かつどうである。↗

  Watching TV is a passive activity.
• 活躍かつやくJLPT N2approx.Common
  noun, suru verb, intransitive verbActivity with a positive coloring: energetic or successful activity, great efforts, active participation — the word for someone making a noticeable, successful contribution.
  仕事しごとでご活躍かつやくですね。↗

  I see you're doing very well in your business.
• 活性かっせいCommon
  nounThe technical term for activity in scientific contexts — the activity of enzymes, catalysts, and similar substances — not the everyday word for people or organizations being active.
• アクティビティCommon
  nounThe loanword, used mainly for activities as things to do — leisure, outdoor, or classroom activities — rather than for the abstract fact of being active.
• 営みいとなみCommon
  nounActivity as the ongoing conduct of life or work — one's daily round of living and working — often with a reflective tone; also the performance or execution of something.

Use 活動 for activity in the general sense of people, organizations, or things being active; 活躍 for energetic, successful activity; 活性 for scientific activity; 「アクティビティ」 for leisure or classroom activities; and 「営み」 for the conduct of daily life.

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

• 活動かつどうactivity (of a person, organization, animal, volcano, etc.)
• 活躍かつやくactivity (esp. energetic or successful)
• 活性かっせいactivity
• アクティビティactivity
• 営みいとなみactivity
• 能動のうどうactivity
• 活況かっきょうactivity
• 敏速びんそくquickness
• 賑わいにぎわいprosperity
• 活量かつりょうactivity
• 能動性のうどうせいactivity
• 事業じぎょうbusiness
• 稼働かどうworking (and earning money)
• 活かつaction
• 働きはたらきaction