His best-known role is voicing Takeshi "Gian" Goda in the Doraemon series, which has spawned numerous specials.
Kimura was born to a German father and a Japanese mother in Blankenburg (Harz) and raised in Japan.
After spending seven years in Germany, he returned to the theater company belonging to Sanno Production.
When he was in elementary school, he appeared as a child who resembled Kenji Haga in the impersonation program Mimakin on Nippon TV.
On 15 April 2005, he became the new voice of Takeshi "Gian" Goda in TV Asahi's anime series Doraemon, replacing the late Kazuya Tatekabe.