Adultery
"Adultery" in Japanese
.婚外性交
kongai seikō
(sexual intercourse by a married person with someone other than their spouse)
不倫
furin
(sexual intercourse by a married person with someone other than their spouse)
姦淫
kan'in
(sexual intercourse by a married person with someone other than their spouse)
姦淫
kan'in
(lewdness or unchastity of thought as well as act, as forbidden by the seventh commandment)
姦通
kantsū
(sexual intercourse by a married person with someone other than their spouse)
密通
mittsū
(sexual intercourse by a married person with someone other than their spouse)
私通
shitsū
(sexual intercourse by a married person with someone other than their spouse)
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.