How to say "inactive" in Japanese

• 低調ていちょうCommon
  na-adjective, nounCovers activity that is inactive or sluggish in a general sense. Often said of business, sales, or trading that is slack and below its usual level, without pointing to any particular cause.
  今いまの太陽たいようの活動かつどうは低調ていちょうですが、それでも時々ときどき大おおきな黒点こくてんが現あらわれます。↗

  The sun is currently in a period of low activity but even so large sunspots occasionally appear.
• 緩慢かんまんCommon
  na-adjective, nounDescribes movement, action, or pace that is slow and sluggish — the physical sense of inactive rather than the commercial one. Use it when something literally moves or proceeds with little energy or speed.
  コンピューターは、たとえ緩慢かんまんにせよ大おおきな変化へんかを引き起ひきおこした。↗

  Computers caused a great, if gradual, change.
• 閑散かんさんCommon
  na-adjective, nounThe word for business or trade that is inactive: a shop, market, or industry in an off-season lull, with little custom or activity. It points to a quiet period rather than economic distress.
• 不景気ふけいきJLPT N1approx.Common
  na-adjective, nounDescribes business that is poor or inactive because conditions are bad, a slump in trade. For "inactive" it fits only this economic sense; it is not used of slow movement or a quiet off-season.

For inactive business choose 閑散 for an off-season lull or 不景気 for depressed conditions; use 低調 for activity that is generally sluggish or slack, and 緩慢 for slow, sluggish movement.

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

• 低調ていちょうinactive
• 緩慢かんまんslow
• 非活動ひかつどうinactive
• 非活性ひかっせいinactive
• 不活発ふかっぱつdull
• 閑散かんさんinactive (business, trade, etc.)
• 不景気ふけいきpoor (business)
• 不活性ふかっせいinactive