How to say "downtime" in Japanese

• ダウンタイム
  nounA direct katakana borrowing of 'downtime', used for the time a computer system, machine, or service is out of operation; the closest match when you want the technical term itself.
  機械きかい故障こしょうによるダウンタイム。↗

  The downtime is caused by a mechanical problem.
• 停止期間ていしきかん
  nounCovers the same out-of-operation sense but as a plain descriptive phrase: literally 'a period of stoppage', used for the span during which operations or a service is halted or suspended.

Both are less common equivalents: 「ダウンタイム」 is the direct loanword for the technical sense of a system or machine being out of operation, while 停止期間 is a descriptive term for a period during which something is stopped or suspended.

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

• ダウンタイムdowntime
• 停止期間ていしきかんdowntime