Isshin Chiba is a Japanese voice actor born on June 26, 1968, in Kesennuma, Miyagi Prefecture. He is affiliated with the Arts Vision talent agency. His real name is Kazunobu Chiba, which uses the same kanji characters as his stage name. After graduating from high school, he pursued his interest in stage acting by enrolling at the Katsuma Voice Actor's Academy in Tokyo, beginning his career in voice acting in 1990 at the age of 22.

Chiba is widely recognized for his extensive work in anime, video games, and film dubbing. One of his most prominent and long-running roles is that of Jin Kazama in the Tekken series, a role he has voiced since Tekken 3 in 1997. This long-standing association with the character places him among the actors with the longest tenure for a single video game角色. His portrayal of Jin extends to numerous sequels, crossover games like Street Fighter X Tekken and the Project X Zone series, and animated adaptations such as Tekken: Blood Vengeance and Tekken: Bloodline.

In anime, he has a significant and enduring role as Officer Kazunobu Chiba in the long-running series Detective Conan (also known as Case Closed), a character who shares his real surname. His other anime credits are extensive and include Fubuki Spring in Scarlet Nexus, Critter in Sword Art Online: Alicization - War of Underworld, Anton Fellner in Legend of the Galactic Heroes: Die Neue These, Ryuji Danma in Great Teacher Onizuka, Silver Knight in.hack//Sign, Scythe Master in Phantom ~Requiem for the Phantom~, and multiple characters in the One Piece franchise, such as Hammond and Gladius.

Beyond his defining role as Jin Kazama, Chiba's video game work is equally prolific. He has voiced characters such as Jedah Dohma from the Vampire/Darkstalkers series, Sean Matsuda in the Street Fighter III games, Kyosuke Kagami in the Rival Schools series, Albel Nox in Star Ocean: Till the End of Time, DIO in JoJo's Bizarre Adventure, and Fou-Lu in Breath of Fire IV. His career also includes voice work in tokusatsu productions and Japanese dubs of foreign films and television series. With a career spanning over three decades, Isshin Chiba has built a reputation as a versatile and enduring presence in the Japanese voice acting industry.