Takeshi Watanabe (渡辺 剛, Watanabe Takeshi, December 2, 1967) is a Japanese keyboardist, composer and music producer born in Utsunomiya, Tochigi Prefecture.

He started as a keyboard player at the age of 20 and since then has performed in numerous stages and recordings. In 2004 he debuted as a composer with the theme song and soundtrack of the TV animation This Ugly Yet Beautiful World (Kono Minikukumo Utsukushii Sekai). Since then, he has scored numerous animation productions, including Strawberry Marshmallow franchise, To LOVE-Ru franchise, Saki franchise and Nogizaka Harukano Himitsu franchise.