How to say "manufacturing" in Japanese

Choosing the right word
  • 加工かこうJLPT N1approx.Common
    noun, suru verb, transitive verbCovers manufacturing as the physical processing, treatment, or machining of materials — working raw material or parts into a finished form, as on a factory line.
    イチゴは加工かこうされてジャムになります。↗
    Strawberries are made into jam.
  • 作りつくりJLPT N1approx.Common
    nounA general word for the making or producing of things; it can also point to how something is made — its build or make — rather than to industry as a whole.
    あの家いえはレンガ造つくりだ。↗
    That house is built of bricks.
  • 工作こうさくJLPT N1approx.Common
    noun, suru verb, transitive verbMarginal as 'manufacturing': the word really refers to handwork or craftwork, the kind done at school or as a hobby, or to construction and engineering work, so it is seldom the term you want here.

Use 加工 for manufacturing as the processing or treatment of materials, 「作り」 for the general act or manner of making things, and avoid 工作 for manufacturing, since it normally refers to craftwork or construction.

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

Japanese equivalents
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JLPT vocabulary levels are community estimates, not official (no official lists have been published since the 2010 revision).

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