Nihoner

“Informal seal” in Japanese

Short answer
認印 ninin にんいん

Informal seal in Japanese is “認印” (ninin). Full meaning: private seal, personal seal, unregistered seal, informal seal, signet.

Other ways to say “Informal seal” 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.