How to say "man-hour" in Japanese

• 人時にんじ
  nounA direct, literal rendering of 'man-hour' as a unit of labor time. It is less common in everyday use, so learners may meet it more often in writing about labor or cost accounting than in speech.
• マンアワー
  nounA loanword used for 'man-hour' as a unit of labor time, typically in estimating or totaling work effort. Being a straightforward borrowing of the English term, it is an easy choice when the unit sense is meant.
• 工数こうすう
  nounCovers the 'man-hour' sense but leans toward 'workload': it names the amount of labor a task requires, often as a figure to be estimated or allocated, especially in project and engineering contexts.

人時 and 「マンアワー」 are direct equivalents of 'man-hour' as a unit of labor time; 工数 covers that sense but leans toward 'workload', the amount of labor a task requires.

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

• 人時にんじman-hour
• マンアワーman-hour
• 工数こうすうworkload