How to say "bedtime" in Japanese

• 寝る時間ねるじかん
  expression, nounCovers the everyday sense of 'bedtime', the time when someone goes to bed. Plain and conversational, it fits casual talk about daily routines, such as a child's bedtime; a less common rendering of 'bedtime'.
  そろそろ寝ねる時間じかんだぞ。↗

  It's time you went to bed.
• 就寝時間しゅうしんじかん
  nounRefers to the same time of going to bed but in a formal register, as in schedules, rules, and notices — a hospital or dormitory bedtime. A less common way to say 'bedtime' overall.

Both words refer to the time when someone goes to bed: 「寝る時間」 is the plainer, conversational choice for everyday talk, while the more formal 就寝時間 suits schedules, rules, and written contexts; both are relatively uncommon renderings of 'bedtime'.

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

• 寝る時間ねるじかんbedtime
• 就寝時間しゅうしんじかんbedtime