
Actor
Gaku Oshida
Born 1997 · Yokosuka, Kanagawa, Japan
Gaku Oshida is a Japanese actor and dancer who portrayed Geiz Myokoin/Kamen Rider Geiz in "Kamen Rider Zi-O". Until March 31, 2021, Oshida was affiliated with Ever Green Entertainment. In November of 2016, Oshida was the winner of the 29th Junon Super Boy Contest and attended the contest alongside contestants Hiroki Iijima and Ryutaro Okada. He made his first drama appearance in a live-action adaptation of the manga series "Inside Mari". In mid-2018, he was cast as Geiz Myokoin in "Kamen Rider Zi-O".
Acting

Unnatural
澤田・松本 · 2018

Kamen Rider
Geiz Myoukouin / Kamen Rider Geiz · 1971

Mr. Unlucky Has No Choice but to Kiss!
Saku Tsujimura · 2022

Cosmetic Playlover
Sahashi Tenma · 2024

Honey Lemon Soda
Student · 2021

In-House Marriage Honey
Yamagata Yuki · 2020

Kamen Rider Zi-O
Geiz Myoukouin/Kamen Rider Geiz · 2018

Kamen Rider Heisei Generations Forever
Geiz Myoukouin / Kamen Rider Geiz · 2018

Kamen Rider Zi-O the Movie: Over Quartzer
Geiz Myoukouin / Kamen Rider Geiz · 2019

Kamen Rider Zi-O: Final Stage
Geiz Myokoin / Kamen Rider Geiz · 2020

Kamen Rider Zi-O NEXT TIME: Geiz, Majesty
Geiz Myokoin / Kamen Rider Geiz · 2020

Kamen Rider Reiwa: The First Generation
Geiz Myoukouin / Kamen Rider Geiz · 2019

Sugar Sugar Honey
Akanishi Sota · 2024

Samurai Sensei
Toranosuke · 2018

Love Thunder
Somei Aoi · 2025

RIDER TIME: Kamen Rider Zi-O VS Decade
Geiz Myoukouin / Kamen Rider Gates · 2021

The 8.2 Second Rule
Shuto Miyagi · 2022

RIDER TIME: Kamen Rider Ryuki
Geiz Myokouin / Kamen Rider Geiz · 2019

Grim Reaper Case Book
Ippachi · 2020

GRAPARA!
Sumida Shinobu · 2025
DEAD ENDー羅刹の刻印ー
Aoi Soji · 2026

Kamen Rider Zi-O: Special Event
Geiz Myoukouin · 2019

Kamen Rider BiBiBi no Bibill Geiz
Geiz Myokoin / Kamen Rider Geiz · 2019
Heisei Kamen Rider 20 Series: Supplementary Plan
Geiz Myoukouin · 2018