Issei Mamehara

, is a Japanese singer and actor. He debuted as a member of the Japanese boy band JO1 in 2020, after placing first in the first season of Produce 101 Japan. He made his debut as an actor in 2021 and played Kamen Rider Chimera in the Kamen Rider Revice films.

Early life and education Issei Mamehara was born on May 30, 2002, in Maniwa, Okayama, Japan. During his early years, he developed a passion for physical activities, participating in baseball, swimming, and sumo tournaments throughout his school life. This interest deepened when he became a fan of the boy band Generations from Exile Tribe after watching one of their televised performances, prompting him to enroll in a dance school in his second year of junior high. He specialized in 1990s hip hop dance Mamehara also grew up with a deep appreciation for tokusatsu media, particularly the Kamen Rider franchise, and aspired to appear in the series as an actor.

Career 2019–2020: Produce 101 Japan and debut with JO1 After failing a series of auditions in 2019, Mamehara's older sister, a fan of South Korean Produce 101, suggested he try out for Produce 101 Japan. Having limited knowledge about K-pop, he initially refused to apply because he wanted to be a professional dancer instead.

Following an "intense" boot camp in South Korea,

2020–present: Acting debut In November 2020, Mamehara was named Mezamashi TVs monthly entertainment presenter, making him the segment's youngest presenter at that time. He reprised his role in Birth of Chimera (2022), an exclusive Toei Tokusatsu Fan Club spin-off film that delves into his character's backstory. In the following year, he made his TBS Sunday Theatre debut in the Ryunosuke Kamiki-led drama . Later that year, he is set to play the lead role of Tsukasa Kiriki for the live action movie adaptation of the manga Bad Boys and co-star opposite in the family drama Mt. Fuji, Coffee, and the Formula for Happiness. Issei will play Ichige's grandson, Takuma, a university student who likes coffee and discovers his dream with his grandmother. "Not Puppy Love" 2025 47 JPN: 715 Songwriting credits All song credits are adapted from the Japanese Society for Rights of Authors, Composers and Publishers's database, unless otherwise noted. +Key Indicates a non-commercial release

+ Title Year Artist(s) Album Lyrics Credit With "Breaking the Rules" 2023 Keigo, Takumi, Máme 2023 JO1 2nd Arena Live Tour "Beyond the Dark – Rise in Kyocera Dome" Keigo, T.K, Máme "Mama" Makka

Filmography

Film + Year Title Role Note 2021 Meters Away, Worlds Apart Hiroki Asada Segment: "Today is A Good Day" 2022 Nozomu Otani / Kamen Rider Chimera 2025 Bad Boys: The Movie Tsukasa Kiriki Lead role 2022 Short Program Hajime Toshino Lead role; anthology series Kamen Rider Revice Movie Spin-Off Web Drama: Birth of Chimera Nozomu Otani Lead role; television film 2023 Hiroshi Tanaka Azatoi Type A to Z Takuma Drama segment of Nobuyuki Yamamoto 2024 Mame's and Sho's Best Holiday - JO1derful Tour Himself With Sho Yonashiro Seiya

Music videos + Year Title 2025 "Not Puppy Love" "Mama"

Footnotes