こうさい 交際 Common word JLPT N3 LinksSentence search for 交際Sentence search for こうさいKanji details for 交 and 際Edit in JMdict Noun, Suru verb, Intransitive verb1. company; friendship; association; society; acquaintanceNoun, Suru verb, Intransitive verb2. (romantic) involvement; dating Discussions Log in to talk about this word.