Last name ユウイチ (Yuichi 
, ユウイチ , Yuuichi 
) , around the globe, is a common family name. The family name ユウイチ is characteristic of Japan, where it is quite a common surname, Taiwan, where it is a rare surname, and Malaysia. Measured by absolute frequency, this name is the most popular in Eastern Asia, particularly Japan, China, and Taiwan. Much less frequently, ユウイチ is the forename as well as the last name.