
Seiji Takaiwa
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Seiji Takaiwa is a Japanese stunt performer and suit actor from Saitama Prefecture affiliated with Japan Action Enterprises. He is married to retired stunt performer and suit actor Rie Murakami. He has been cast in many leading roles in the Super Sentai and Kamen Rider series, portraying a diverse range of characters. He has been the suit actor of 17 out of the 19 lead Heisei Kamen Riders. Because of his many lead roles in the series, fans have dubbed him "Mr. Kamen Rider".
Known for
Credits

Kamen Rider Kiva: King of the Castle in the Demon World (2008)
as Policeman

Agito: Superpower War (2026)
as Police officer

The Living Dragon (2026)
Actor

Kamen Rider 555 20th: Paradise Regained (2024)
as Ramen Shop Regular Customer

Shogun's Ninja (2025)
as Munenori Yagyu

Heisei Rider vs. Showa Rider: Kamen Rider Wars feat. Super Sentai (2014)
as Worker

Kamen Rider Ghost RE:BIRTH - Kamen Rider Specter (2017)
as Gyro

Kamen Rider Agito Special: A New Transformation (2001)
as Kamen Rider Agito (Suit Actor)

Ninja Sentai Kakuranger Part 3: The Fights of Middle Age (2024)
as Jagoemon

Kamen Rider Decade: All Riders Super Spin-off (2009)
as Himself

Lady Battle Cop (1990)
Actor

Good Morning, Sleeping Lion (2022)
as Kazuma Kujo

Kamen Rider Ryuki Hyper Battle Video: Ryuki vs. Kamen Rider Agito (2002)
as Kamen Rider Agito (voice)

Kamen Rider Revice the Movie Spin-Off: Birth of Chimera (2022)
as Akinari Otani

HE -LOW THE FINAL (2022)
Actor

Good Morning, Sleeping Lion 2 (2024)
as Kazuma Kujo

Tatsujin Warriors (2025)
Actor

Kamen Rider Ghost: Final Stage (2017)
as Gyro

Tokusou Robo Janperson the Movie: Mother is Eternal! The Electric Brain’s Love and Passion on the Operating Table (1993)
as Neo Guild Killer Robot

Momotaros' Summer Vacation (2007)
as Momotaros (suit actor)





