1988 - present B'z is the most popular rock group in all of Japan. They have produced a consecutive string of number one hits since their fifth single was released in 1990. B'z consists of Tak Matsumoto (Guitar) and Koshi Inaba (Vocals). Their supporting band has even included renowned bassist Billy Sheehan. The current supporting line-up consists of Shane Gaalaas (Drums), Akira Onozuka (Keys) and Akihito Tokunaga (Bass) and Shinichiro Ohta (Guitars) of doa. Both members of B'z have also pursued solo careers in addition to performing with the band.