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)

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.