Sponsored Links Koshi Inaba dating Whom? Koshi Inaba is currently single Koshi Inaba Complete Dating History Add new Post Sponsored Links Koshi Inaba wiki Login to Edit Bio: Japanese singer and multi-instrumentalist best known as one half of the acclaimed hard rock duo B'z. He joined Yokohama National University's Faculty for Education with the intention of becoming a math teacher in 1983.Date of Birth: 23 Sep, 1964Zodiac Sign: VirgoPlace of Birth: JapanAge: 61 years oldProfession: Rock singer Show more bio data > Koshi Inaba Latest Videos