“Sexual relations” in Japanese
Short answer
Sexual relations in Japanese is “性交渉” (seikoushou). Full meaning: sexual relations.
Other ways to say “Sexual relations” in Japanese
肉体関係
nikutaikankei sexual relations, physical relations, carnal relations
性的関係
seitekikankei sexual relations, sexual relationship
男女関係
danjokankei male-female relationships, relations between the sexes, sexual relations
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