How to say "duplicate" in Japanese

• 写すうつすJLPT N4approx.Common
  godan verb, transitive verbThe verb for the action of copying: to duplicate or reproduce a document or picture; it also covers tracing. Use it when 'duplicate' describes what you do rather than the thing you get.
  このページをノートに写うつしておきなさい。↗

  Copy this page in your notebook.
• 写しうつしJLPT N1approx.Common
  nounThe noun for the copy itself: a duplicate, facsimile, or transcript; it is the noun counterpart of the verb 写す and what you ask for when you need a copy of a document.
  その写うつしは原本げんぽんと合あっている。↗

  The copy agrees with the original.
• 副ふくCommon
  nounListed as 'duplicate; copy', but on its own it is seldom the word you want: it is mainly encountered inside compounds, and for a duplicate of a document 写し is the natural choice.

Use the verb 「写す」 for the act of duplicating or copying (it also covers tracing), the noun 「写し」 for the copy itself—a facsimile or transcript—and treat 副 as marginal on its own.

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

• 写すうつすto copy
• 写しうつしcopy
• 副本ふくほんduplicate
• デュープduplicate
• デュプリケートduplicate
• 副書ふくしょcopy
• 副ふくduplicate
• 控えひかえduplicate