
Issei Mamehara
Acting
Known For

The jockey curriculum at the Horse Racing School... A school with incredibly difficult entrance requirements, where only one out of every ten to twenty applicants is accepted, and students need not just book smarts, but also physical and athletic abilities. There, a boy who is a popular idol meets his real dream for the first time. A boy who grew up on an island dreams of spending his days racing with horses. A boy from England is unsure of the path his parents have chosen for him, but still chooses to follow his dreams. This is a story about boys who pursue their dream of becoming a jockey.
Fanfare of Adolescence

Global music icons team up with world-renowned K-pop idols for spectacular song battles. Performing their biggest hits with a K-pop twist, these artists show up, show out, and shut it down in a friendly competition for the ultimate bragging rights.
KPOPPED

An anthology drama series adapted from Mitsuru Adachi's series of short story comics of the same name, with each episode starring a different member of J-pop group JO1.
SHORT PROGRAM

Japanese entertainment conglomerate Yoshimoto Kogyo and South Korean entertainment company CJ E&M will co-produce “PRODUCE 101 JAPAN”, based on the reality television talent competition franchise popular in South Korea and China. This Japanese spin-off follows 101 trainees with the intention of producing an 11-member boy band, with members selected by viewers.
PRODUCE 101 JAPAN

A boy meeting his girlfriend's father for the first time. Visiting a hospitalized high school classmate. The last drink between a failed entertainer and his manager. Combat that ends up in a rap battle. A conversation between sisters at their mother's funeral. An encounter between two random time travelers.
Meters Away, Worlds Apart

Hiroshi is a seemingly ordinary young man that works part-time at a gyoza shop, but the reality is he’s actually a fortress for a planet! Each of his movements is produced by someone inside him steering, which is why he goes through life without getting entangled with other humans. Due to an incident, Shizuka begins to have feelings for Hiroshi, and Akemi suddenly becomes captain of the fortress and must handle these new complications while trying to find a new future for her planet.
Super Human Fortress Record of Hiroshi War

The Igarashi siblings travel to the forbidden Area 666 to rescue airjacking victims (including their parents!) from the dangerous criminal known as Azuma, who wishes to judge the fate of humanity himself.
Kamen Rider Revice the Movie: Battle Familia

The origin story of Nozomu Otani, a young man who inherits the powers of Kamen Rider Chimera from his friend Ryu Mukai. This special serves as a prequel to the events of Kamen Rider Revice: Battle Familia.
Kamen Rider Revice the Movie Spin-Off: Birth of Chimera

A story in which Emi, the owner of a general store, brightly and powerfully solves small troubles brought in by her family and those around her.
Recommendations for a Rough Life

Tsukasa Kiriki, the only son of a wealthy family, runs away from home because he admires the legendary delinquent Murakoshi, who has helped him since he was a child. He runs away from home and volunteers to join the "BEAST", the strongest team in the warring tribes era, but is turned away and meets Yoji Kawanaka on his way out. Yoji, together with Hisao Nakamura and Eiji Iwami teach Tsukasa how to be a delinquent, and the four become friends. Toshi, the seventh generation of the weak “Gokurakucho” team, asks them to join him in his fight against the “Hiroshima Night's”. Trying to avoid a fight, former Knights executive Hisao goes to see the head of the Knights, Hiro, and is wounded. Angry Tsukasa and the others are ready for the fight, and the battle between the Knights and the Gokurakucho begins.
Bad Boys: The Movie

JO1's first online live in 2021, "JO1 Live Streaming Concert STARLIGHT DELUXE was held from 19:00 on Saturday, February 20th. The concept of the show was 'Traveling in space with JO1', and the performance that was the true value of JO1, which has been further powered up from 'STARLIGHT'.
JO1 Live Streaming Concert STARLIGHT DELUXE

Takuma, a university student who has just started living with his grandmother Fumiko, finds a university admissions guide in his late grandfather Eishi's study. It was a surprise for Fumiko, left behind by Eishi. Fumiko takes a step forward and enjoys her days of "studying," a dream she had as a young person. Meanwhile, Takuma is unsure of his dream and worries about his future. The two then find a mysterious mathematical formula in Eishi's notebook, who loved Mount Fuji...
Mount Fuji, Coffee, and the Formula for Happiness

The documentary covers the first two years of JO1, an 11-member Japanese boy band formed from the audition television program Produce 101 Japan. The group was promised a spectacular career, but they were not confident they could make it. Selected based on votes by viewers, each member of JO1 has different experience in performing, including members who had never taken any vocal or dance lessons before. Moreover, the COVID-19 pandemic hit the world not long after the release of their debut single, Protostar, on March 4, 2020, and forced them to restrict their activities. Despite these difficulties, JO1 grew through daily vocal and dance lessons, promotional activities, and program recording. The film closely follows the group from the early stages of their debut to their long-awaited first live concert with an audience, titled 2021 JO1 Live "Open the Door", in November 2021.
JO1 the Movie: Unfinished - Go to the Top

A university student who has moved in with his recently-widowed grandmother finds a university admission guide his grandfather has left for his wife, who didn't get the opportunity to study in her youth.
Mt. Fuji and Happiness Code

JO1 is a global boy group formed in 2019 by 11 members selected in PRODUCE 101 JAPAN. Since their debut in 2020, they have steadily progressed under the slogan “GO TO THE TOP!” In 2025, they held their first world tour and their first solo concert in Tokyo Dome. This is the second documentary film that shows the glory of their 5 years of challenging the world and the thoughts and conflicts that the 11 members had in their hearts, and the bond between them during their journey. The trajectory and future of the 11 members, presented to all those who are chasing after their dreams.
JO1 THE MOVIE『未完成』-Bon Voyage-

Solo concert produced and starred by Mamehara Issei from JO1 on 01/29 at Theatre G-Rosso. This concert is part of a series of solo performances called 'SHOW PRODUCED by MEMBERS' that occurred during LAPOSTA 2025, event organized by Lapone Entertaiment, from 01/27 until 01/29.