Copyright © 2026 Kotomora. All Rights Reserved.
不純異性交遊 (ふじゅんいせいこうゆう) Japanese meaning | Kotomora
Meanings 1
noun
illicit sexual relationship ; improper relations with the opposite sex
A formal or euphemistic term for a sexual relationship considered morally or socially inappropriate, often used in legal, educational, or disciplinary contexts.
そく
で
不ふ
純じゅん
異い
性せい
交こう
遊ゆう
は
禁きん
止し
さ
れ
て
いる
。
Improper relations with the opposite sex are prohibited by school rules.
Kanji 純 genuine, purity, innocence 異 uncommon, different, queerness 交 mingle, mixing, association Similar words 不ふ 倫りん 不倫 specifically refers to adultery or an extramarital affair, while 不純異性交遊 is a broader, more formal term for any improper sexual relationship, not necessarily involving marriage.
淫いん 行こう 淫行 is a stronger, more condemnatory term for sexual misconduct or lewd acts, often with a criminal connotation, whereas 不純異性交遊 is a milder, bureaucratic expression.
Etymology Compound of 不純 (impure, improper) + 異性 (opposite sex) + 交遊 (socializing, association). The exact origin is uncertain, but it likely arose in formal or institutional settings to describe relationships deemed inappropriate.
