Arimaro Mukaino is a Japanese voice actor affiliated with the agency Production Ace. He was born in Sapporo, Hokkaido, on September 21, 2001. Before entering the industry, he graduated from the Sapporo Broadcasting Art and Music Dance College and moved to Tokyo with aspirations of becoming an actor.

Mukaino made his debut as a voice actor in 2021, landing his first and most prominent role to date as Sho Kamui in the television anime series Getter Robo Arc. This role was a significant start to his career, as he was cast as one of the main pilots in the latest installment of the long-running Getter Robo franchise. In the series, he voiced the 19-year-old pilot of the Getter Kirik, a character who, like Mukaino himself at the time, was also 19 years old. Following his anime debut, he also reprised the role of Sho Kamui in the 2021 video game Super Robot Wars DD.

Following his debut, Mukaino has taken on additional roles in anime and other media. He had a minor role as a security guard in Tsukipro The Animation 2 in 2021 and voiced a character named铠先生 in the 2022 series Chii-chan wa Chotto Tarinai. In 2022, he was also part of the audio content project Bad Town Reversal, playing the character Ryosuke Kadokado. His profile indicates he has interests in painting, video games, and collecting figures, and lists his special skills as skincare and hairdressing.