Cognomen ญี่ปุ่น (Japanan 
, Japate 
, ญี่ปุ่น) , in the world, is a rare last name. The last name ญี่ปุ่น is characteristic of Thailand, where it is a very rare surname, and India. Much less frequently, ญี่ปุ่น is the forename as well as the last name.