Abingdon Boys School (A.B.S.) is a Japanese rock band formed in 2005. The members are Nishikawa Takanori (T.M.Revolution) on vocals, SUNAO on guitar, Shibasaki Hiroshi on electric guitar and Kishi Toshiyuki on keyboards. SUNAO and Shibasaki are also involved in T.M.Revolution's backup band. Toshiyuki had arranged several songs on T.M.Revolution's 2006 album "UNDER:COVER".
Nishikawa is well recognized among the Japanese media as a singer and producer.