Kentarou Miura was born in Chiba City in 1966 and was left-handed. He started making manga absurdly early—at ten years old, he created Miuranger for his classmates, which somehow stretched to 40 volumes. By his teens, he was experimenting with professional techniques and publishing doujinshi. In 1985, he got into Nihon University's art program on the strength of Futanabi, which later earned a Best New Author nomination in Weekly Shounen Magazine. He also published Noa that year, but editorial conflicts killed the project and sent his career into a rough patch.

He recovered in 1988 with a 48-page prototype that introduced the world of Berserk and won him a prize from the Comi Manga School. After that came collaborations with writer Buronson—Ourou (King of Wolves) in 1989, and Japan a couple years later—but Berserk is what changed everything. The serialization began in Young Animal in 1992 with "The Golden Age" arc, and it exploded. The series made him one of Japan's most respected mangaka, and he basically devoted himself to it full-time after that, though he mentioned wanting to work on other projects eventually.

Miura supervised a 25-episode anime adaptation in 1997 and lent his talents to various Berserk video games and art books over the years. He also designed the Vocaloid Kamui Gakupo. The franchise spawned endless merchandise—figures, statues, games, card games, the works. In 2002, he placed second in the Osamu Tezuka Culture Award for his work on Berserk.

Miura died on May 6, 2021, from acute aortic dissection at age 54.