is a Japanese guitarist who has performed with Japanese rock bands such as The Blue Hearts, The High-Lows and The Cro-Magnons.Rerelease of Masatoshi Mashima's Solo Pieces. CDJournal.com. Accessed February 7, 2008. He was born in Hino and raised in Kodaira in Tokyo, Japan.

His nickname while playing was "Mashi."Nippop | The Blue Hearts | Profile . Nippop. Accessed February 6, 2008.

Solo albums Natsu no Nukegara () (November 21, 1989) Happy Songs (April 10, 1991) Raw Life (November 1, 1992) Hito ni wa Sorezore Jijō ga Aru () (October 21, 1994) Raw Life -Revisited- (April 25, 2007)

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