There is another Japanese musician by the same name in Japanese, 増田俊郎, but read as Masuda Toshiro instead of Masuda Toshio. This artist is Toshio Masuda, the composer. The other 増田俊郎 is Toshiro Masuda, the vocalist.
Toshio Masuda (増田 俊郎, Masuda Toshio, born October 28, 1959) is a Japanese composer. He has composed and synthesized scores for several Japanese television shows and animated series.
Masuda is perhaps best known as the composer of the 2002 hit anime series Naruto where he combined traditional instruments like the shamisen and shakuhachi together with guitar, drums, bass, piano and other keyboard instruments along with chanting. The soundtrack to Naruto Shippuden, the sequel to Naruto, was not composed by Masuda, but instead by Yasuharu Takanashi.