Sigma Seven

Sigma Seven Co., Ltd. (株式会社シグマ・セブン) is a Japanese talent management firm representing a fair number of voice actors and entertainers. Founded on March 3, 1988, Sigma Seven is headquartered on the third floor of the Haga Building in Minato, Tokyo, Japan.

Notable voice actors
Female
 * Fumie Mizusawa
 * Asuka Ōgame
 * Reiko Takagi
 * Megumi Takamoto
 * Sakiko Tamagawa
 * Ai Uchikawa
 * Kana Ichinose
 * Yukana

Male
 * Shin Aomori
 * Masaya Hashimoto
 * Takuro Kitagawa
 * Yasunori Matsumoto
 * Akio Nojima
 * Akio Suyama
 * Hideki Tasaka
 * Norio Wakamoto
 * Hiroki Yasumoto
 * Makoto Yasumura

Formerly attached talent

 * Shōya Chiba (currently with Toy's Factory)
 * Misato Fukuen (currently with StarCrew)
 * Shozo Iizuka (deceased)
 * Kaori Ishihara (currently with Style Cube)
 * Marina Inoue (currently with Aoni Production)
 * Nana Mizuki (currently with StarCrew)
 * Showtaro Morikubo (currently with Add9th)
 * Yuichi Nakamura (currently with INTENTION)
 * Hirofumi Nojima (currently with Aoni Production)
 * Yui Ogura (currently with Style Cube)
 * Asami Seto (currently with StarCrew)
 * Atsushi Tamaru (currently with Mausu Promotion)
 * Kazuki Yao (currently with Max Mix)
 * Hiroyuki Yoshino (currently as ninelive.)