Icon-kr.png This article is about a/an actor in the Kamen Rider Series.

Eiji Akaso (赤楚 衛二 Akaso Eiji), formerly known under the stage name Mamoru Akaso (赤楚 衛 Akaso Mamoru), is a Japanese actor and model affiliated with Tristone Entertainment Inc. He portrayed Hiroki Nagase in the second season of Kamen Rider Amazons and Ryuga Banjo in Kamen Rider Build.


Akaso began his modeling career in his teens under his former stage name. In 2010, Akaso was a member of BOYS AND MEN, but left later on.

Post Kamen Rider

In December of 2019, he and Kamen Rider Drive star Fumika Baba co-star in a drama series titled Hey Sensei! Did You Know?

In late 2020, he starred in the drama series Cherry Magic! Thirty Years of Virginity Can Make You a Wizard?!.





Akaso wearing a paper-made Kamen Rider mask in childhood.

  • In a Kamen Rider Build press conference, he said that his favorite rider is Kamen Rider Kuuga and his grandfather bought him a Kuuga transformation belt on his birthday.
  • With his guest appearance in Kamen Rider Zi-O, he is the first Rider actor to have been in three consecutive Heisei productions in a row, with his first appearance in the franchise as Hiroki Nagase in Season 2 of Kamen Rider Amazons in April of 2017. After the finale of Amazons, he was cast in Kamen Rider Build as as Ryuga Banjou, where the show aired from September 2017 to the end of August of 2018. He would later reprise his role as Ryuga in Zi-O.
  • Akaso has bought Figuarts of Cross-Z and Cross-Z Charge.[1]
  • Akaso was briefly a member of the male music group BOYS AND MEN, a group that former Gaim-star Yutaka Kobayashi is a prominent member of.

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