Susumu Chiba (千葉 進歩, Chiba Susumu) is a Japanese voice actor. Some of his major roles include Seiji Hayami in Cutie Honey Flash, Chiaki Nagoya in Phantom Thief Jeanne, Sai Fujiwara in Hikaru no Go, Jetfire and Wheeljack in Transformers: Armada, Chairman Muranishi in Kirarin Revolution, Isao Kondo in Gin Tama, Sideways in Transformers: Cybertron, Shō Sai in The Story of Saiunkoku, Hans in Nijū Mensō no Musume, Takuma Ichijo in Vampire Knight, Welkin Gunther in Valkyria Chronicles, and Ryuu Daikouji in Little Battlers Experience. He is currently affiliated with Office Osawa.