Biography
The 39's are the band that accompanied Hatsune Miku, Kagamine Len, Kagamine Rin, and Megurine Luka during their 2010 concert in Tokyo (39's Giving Day) and their 2011 concert in Los Angeles (Mikunopolis).
The band members are Akitoshi Kuroda (guitar), Shingo Tanaka (bass), Shin Orita (drums), and Jun Abe (keyboards).
Biography text from Last.fm, available under CC BY-SA.