Nihoner

“Best man” in Japanese

Short answer
介添人 kaizoenin kaizoenin

Best man in Japanese is “介添人” (kaizoenin). Full meaning: best man, groomsman, bridesmaid; second (e.g. in a duel).

Other ways to say “Best man” in Japanese

Looking for the other direction? Search any Japanese word in the Nihoner lexicon, or practise what you have learned in the learning games.