Last name いちろう (Ichiro 
, いちろう) , all around the world, is quite a rare surname. The family name いちろう is habitual in Japan, where it is quite a rare surname, Singapore, where it is a rare surname, and Hungary. Measured by absolute frequency, this name is the most popular in Japan, China, and Indonesia. Also, いちろう is the forename as well as the last name.