Shoji Izumi is a Japanese voice actor born on August 9, 1962, in Akita Prefecture, Japan. He is affiliated with the talent management firm Tokyo Actor's Consumer's Cooperative Society. Throughout his career, he has also been credited under the stage names Hisashi Izumi and Izumi Shouji.

Izumi is a graduate of the now-defunct Yokohama Broadcasting Film Professional Institute, where he completed the acting course. His professional journey includes tenures with Osaka-based offices and Kekke Corporation before joining Tokyo Actor's Consumer's Cooperative Society in 2006. He possesses a high-baritone voice and has listed playing the traditional Japanese wadaiko drum and the guitar as personal interests.

Izumi has built a career spanning several decades with a wide variety of roles in anime, video games, and original video animations. He is known for his work in the Transformers franchise, providing the Japanese voices for the characters Daichi Ōnishi, the Autobot J-Five, and their combined form JRX in the 2000 anime series Transformers: Robots in Disguise, known in Japan as Transformers: Car Robots.

His other prominent anime roles include Tomoyoshi Ishizuka in Dai-Guard, Monobook Dodes in Kojika, the President of the United States in the Read or Die OVA, and Big 5 member Daimon Kogorō / Psycho Shocker in Yu-Gi-Oh! Duel Monsters. He has also had recurring roles in long-running franchises, appearing as various characters in The First King of Boxing and as characters in later series such as Golden Kamuy and The File of Young Kindaichi.

Beyond animation, Izumi has contributed his voice to video games, most notably as the prosecutor Aristotle Means in the 2013 courtroom adventure game Ace Attorney 5 and its 2016 sequel, Ace Attorney 6. His career demonstrates a sustained presence in the Japanese voice acting industry, with credits extending from the mid-1990s through the 2020s, including roles in web anime such as Bastard!! Heavy Metal, Dark Fantasy in 2022 and 2023.