Cognomen Shun'Ichi (俊一 
, シュンイチ 
, Shun'Ichi) , in the world, is a common family name. The last name Shun'Ichi is characteristic of Eastern Asia, particularly South Korea, where it is quite a common surname, Japan, and China, where it is a very rare surname. Much less frequently, Shun'Ichi is the forename as well as the last name.