Kouichi Makishima is a Japanese actor and voice actor born in Tokyo on January 1, 1957. He began his career on the stage after joining the prestigious Haiyuza Theatre Company in 1979, an affiliation he has maintained throughout his professional life. His foundation in theatre, with performances in classic and contemporary plays, has underpinned a long and varied career that spans stage, television drama, film, and voice acting.

Makishima has built an extensive body of work in voice acting for anime, bringing his versatility to a wide range of characters. Among his notable anime roles are Shin Seijou in the long-running historical series Kingdom and Don Teabolo Mass in the Mobile Suit Gundam: The Origin installments, including The Origin II: Artesia's Sorrow and The Origin V: Clash at Loum. His filmography also includes roles in Mob Psycho 100 as Gen, in Kuromukuro as Aramata Minoru, and in Orb: On the Movements of the Earth as Potocki. He has also been heard in series such as Seirei no Moribito, Keroro Gunso, and Aria.

Beyond anime, Makishima is highly active in the field of dubbing, providing Japanese voices for numerous international films and television series. His dubbing credits include work on major Hollywood productions like Die Hard 4.0 and the Twilight films, as well as long-running television shows such as NCIS, Desperate Housewives, and Suits. He has also lent his voice to documentaries and narration work for networks like NHK. Makishima continues to be active in the industry, contributing his vocal talents to new anime and dubbing projects while remaining a dedicated member of the Haiyuza Theatre Company.