Kōji Totani was a Japanese actor, voice actor, and narrator born in Nagoya, Aichi Prefecture, Japan on July 12, 1948. He was a graduate of Tokai University and spent the majority of his career affiliated with the talent agency Aoni Production. Totani passed away on February 6, 2006 at the age of 57 due to acute heart failure. His final appearance was in a 2006 New Year one-hour special of the series Naruto, where he voiced the character Hoki. Following his death, his ongoing roles were taken up by other voice actors.

Totani built an extensive and versatile filmography across a career spanning from 1974 to 2006. He was particularly known for his work in long-running shōnen series and mecha anime from the late 1970s through the 1990s. He frequently voiced supporting characters, antagonists, and comic relief figures, bringing a distinct presence to each performance.

Totani’s resume is marked by several iconic roles. In Fist of the North Star, he played multiple characters across the series, including the treacherous Jagi, the younger version of Ryūken, and Han from Fist of the North Star 2. In the long-running Saint Seiya franchise, he voiced Capricorn Shura, one of the Gold Saints. For Fullmetal Alchemist, he provided the Japanese voice for Tim Marcoh, the State Alchemist who researched the Philosopher's Stone. He was also the voice of Pyunma, the mutant with super-speed powers designated 008, in the 1979 Cyborg 009 series.

His career included significant contributions to the Gundam and Transformers franchises. In the Universal Century Gundam timeline, he voiced characters such as Commander Killing in Mobile Suit Gundam 0080: War in the Pocket, Alpha A. Bate in Mobile Suit Gundam 0083: Stardust Memory, and Gottn Goh in Mobile Suit Gundam ZZ. In the Transformers universe, he voiced several characters across different series, including Motormaster and Menasor in Transformers: Scramble City, Skullcruncher in Transformers: The Headmasters, Blood in Transformers: Super God Masterforce, and Blacker, the combined form Road Caesar, in Transformers: Victory.

Totani also had a long association with the Dragon Ball franchise, where he voiced Ginger in the movie Dragon Ball Z: Dead Zone, as well as Draculaman in the original Dragon Ball and Don Kiar in Dragon Ball GT. He was a regular in the various Kinnikuman television series and films, playing roles including Detective Gobugari and Announcer Yoshigai, as well as numerous other characters. Additional notable roles include the teapot-shaped robot Teapot in Dr. Slump & Arale-chan, Umanosuke Gonda in Sakigake!! Otoko Juku, Akatora in Ginga Nagareboshi Gin, Bistol in Dancougar - Super Beast Machine God, Tchallichammi in the film Royal Space Force: The Wings of Honnêamise, Captain Bœhm in Giant Gorg, and Mohican in Dominion Tank Police.

Beyond anime, Totani was active in video game voice acting, most famously as the original Japanese voice of Revolver Ocelot in Metal Gear Solid and Metal Gear Solid 2: Sons of Liberty. He also voiced the character Leon in the Dead or Alive series and Doku in Ninja Gaiden. He had a career in dubbing foreign films and television series into Japanese, providing voices for actors such as Danny Trejo in Con Air, Peter Greene in The Mask, and Cress Williams in the medical drama ER. His son, Kimito Totani, is also an actor and voice actor.