ごさい 後妻 LinksSentence search for 後妻Sentence search for ごさいSentence search for こうさいKanji details for 後 and 妻Edit in JMdict Noun1. second wifeOther forms後妻 【こうさい】Notesこうさい: Out-dated or obsolete kana usage. Discussions Log in to talk about this word.