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Japanese (language) version; Japanese edition
あの本の日本語版が出た。
The Japanese edition of that book has been released.
翻訳者が日本語版の序文を書いている。
The translator is writing the preface for the Japanese version.
そのソフトウェアの日本語版を現在翻訳中です。
We are currently translating the Japanese version of that software.