How to say "incorporation" in Japanese

Choosing the right word
  • 編入へんにゅうCommon
    noun, suru verb, transitive verbCovers incorporation only in the sense of a person being admitted into an institution, such as transferring into a school or enlisting; for incorporating companies or merging things it is not the word you want.
  • 合体がったいCommon
    noun, suru verb, transitive verb, intransitive verbCovers incorporation as physical fusion: two or more things combining or coalescing into a single body. Typical of machines, vehicles or creatures uniting rather than companies or organizations merging.
    こういう風ふうに合体がったいすれば、14ポートのUSBハブになります。↗
    If you combine them in this way, you get a 14 port USB hub.
  • 合同ごうどうJLPT N2approx.Common
    noun, suru verb, transitive verb, intransitive verbCovers incorporation as the joining of separate groups or bodies into one union, and by extension joint undertakings carried out together. For the merger of companies or towns, 合併 is the word to reach for.
  • 合併がっぺいJLPT N1approx.Common
    noun, suru verb, transitive verb, intransitive verbCovers incorporation as a merger: companies, towns or similar bodies combining into one. When English 'incorporation' means existing organizations amalgamating, this is the word you want.
    2社しゃは合併がっぺいを計画けいかくしている。↗
    The two companies plan to unite.
  • 設立せつりつJLPT N1approx.Common
    noun, suru verb, transitive verbCovers incorporation of a business: legally founding or establishing a company so that it comes into existence as a corporation. In legal or business contexts this is the word you want.

Choose by what is being incorporated: founding a business is 設立, merging companies or towns is 合併, separate groups joining is 合同, things fusing into one is 合体, and admission into an institution is 編入.

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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