Sex
"Sex" in Japanese
セックス
sekkusu
(act of sexual intercourse)
性交
seikō
(act of sexual intercourse)
性別
seibetsu
(reproductive/sexual/gender category (female or male))
セックスする
sekkusu suru
(informal: to have sex with)
性交する
seikō suru
(informal: to have sex with)
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.