The true identity of "Kōichirō" is unknown and people do not even know how to read his family name, but it is widely believed in Japan that "Kōichirō" is a pseudonym of Takeshi Ito, who later worked as assistant animation director on Cowboy Bebop: The Movie and Tactical Roar.
Takeshi Kitano | Takeshi Okada | Takeshi's Castle | Itō Hirobumi | Toyo Ito | Kenji Ito | Takeshi Obata | Takeshi Kaneshiro | Junji Ito | Jeremy Ito | Itō calculus | Yuki Ito | Takeshi Yoshida | Takeshi Terauchi | Takeshi Okumura | Takeshi Mori (voice actor) | Takeshi Morishima | Takeshi Kimura | Sachiko Ito | Miyako Itō | Midori Ito | Lance Ito | Kenichi Ito | Hiromi Itō | Tsutomu Ito | Teiji Ito | Takeshi Yamamoto | Takeshi Ueda | Takeshi Tsuruno | Takeshi Kato |