
Eiji Akaso
Department: Acting
Biography
Akaso Eiji is a Japanese actor and model, known for playing Ryuga Banjou in Kamen Rider Build. He is currently represented by Tristone Entertainment. He belonged to the Nagoya model office "FORM JAPAN" when he was in his teens. He was active as a model and talent under the name Mamoru Akaso (赤楚 衛, Akaso Mamoru). In 2010, he joined the local idol group "BOYS AND MEN" in Nagoya, working on stage performances and regular appearances of variety shows. Eiji is said to have left "BOYS AND MEN" in 2011. Originally, he entered the entertainment agency because he wanted to be an actor and not an idol. He won the Grand Prix at the men's model audition of Samantha Thavasa in 2013, which became the turning point for him to audition in Tokyo at the age of 19. The trigger that lead Eiji to drop out of university and to enter the world of entertainment was a call from the CEO of his current agency in 2014. In 2015, he transferred to his current agency Tristone Entertainment, working as an actor and starring in television dramas and films in his current stage name
Known For

Hakutaka Shirataka Amane no Investigation File
2021

Tales of the Bizarre: 2021 Fall Special
2021

Cherry Magic! THE MOVIE
2022

The Sunday Runoff
2022

Zom 100: Bucket List of the Dead
2023

Commuting to School Series On the Way to School
2015

What If Shogun Ieyasu Tokugawa Was to Become the Prime Minister
2024

Six Lying University Students
2024

Kamen Rider Heisei Generations FINAL: Build & Ex-Aid with Legend Riders
2017

Super Hero Festival: Kamen Rider x Super Sentai Live & Show 2018
2018

Kamen Rider Build The Movie: Be The One
2018

Kamen Rider Amazons Season 2 the Movie: Reincarnation
2018

Kamen Rider Heisei Generations Forever
2018

Kamen Rider Build NEW WORLD: Kamen Rider Cross-Z
2019

Kamen Rider Build: Birth! Bear Televi!! VS Kamen Rider Grease!
2018

Kamen Rider Build: Special Event
2018

Kamen Rider Build: Final Stage
2019

Kamen Rider Build NEW WORLD: Kamen Rider Grease
2019

Keep Your Hands Off Eizouken!
2020

Love Me, Love Me Not
2020

My Long Awaited Love Story
2017

Love Me, Love Me Not
2020

Closest Love to Heaven
2017

The Great Yokai War: Guardians
2021

366 Days
2025

KINKI
2025

Kyojo Reunion
2026

One Year to Live, Buy a Man
—

Date My Daughter!
2021

Date My Daughter!
2021

She Was Pretty
2021

Pending Train
2023

Kazama Kimichika: Kyojo Zero
2023

SUPER RICH
2021

Kamen Rider Build: Transformation Lessons ~The Laws Of Transformation Are Set!~
2017

Turn to Me Mukai-kun
2023

Hiru
2022

Kamen Rider
1971

Kamen Rider
1971

ISHIKO and HANEO: You're Suing Me?
2022

Innocence, Fight Against False Charges
2019

Soar High!
2022

I Shared My Husband
2019

Re: Revenge - At the End of Desire
2024

Tokyo Girl
2016

Hey Sensei, Don't you know?
2019

Amazon Riders
2016

Gourmet Detective Goro Akechi
2020

Keep Your Hands Off Eizouken!
2020

Kamen Rider Build
2017

Kamen Rider Zi-O
2018

Cherry Magic! Thirty Years of Virginity Can Make You a Wizard?!
2020

Cold Case ~Shinjitsu no Tobira~
2016

Inheritance Detective
2025

Zom 100: Bucket List of the Dead
2023

Gimbap and Onigiri
2026