Better known by his stage name Jiro, he is the bassist in the rock band GLAY. GLAY was formed in 1988, and he joined in 1992.
He used to be a guitarist, but switched to bass when he joined the band Pierrot in high school.
In 2008 he also began playing bass in his sideband The Predators.
He has three sisters. He married former What's In Magazine editor Reiko in 2000.
Tonomura Hisashi is one of his GLAY bandmates.