
Seiichiro Nagata
Acting • 1998-07-09 • Shizuoka Prefecture, Japan
In 2016, he made his acting debut in the 3rd season of the musical “The Prince of Tennis”. On October 2, 2017 he transferred from Watanabe Entertainment to SUI Co., Ltd. He is active in 2.5 stages and Musical Touken Ranbu as Murakumo Gou. In November 2023, he appeared in "Kamen Rider Gatchard" and " Kamen Rider Gatchard VS Kamen Rider Legend" as Houou Kaguya Quartz. He left SUI Co., Ltd. on April 30, 2024 and became a freelancer starting May 1, 2024. On July 1st of the same year, he opened his first official fan club and official website.
Known For
6.5Kamen Rider
1971
7.8After Moving Seats, The Boy Behind Me Has A Crush On Me
2026
7.0Kamen Rider Gotchard
2023
10.0Labyrinth Opera: Pretty Boy Detective Club
2022
8.0Kamen Rider Gotchard Short Anime: Gotcha the Seven Mysteries of Furasu High!
2024
7.7Kamen Rider Gotchard: The Future Daybreak
2024
From Nerdspin
Filmography
- 2026★ 7.8
- 2025★ 7.0
- 2025
- 2025
- 2025
- 2025
- 2025
- 2025
- 2024★ 7.7
- 2024Kamen Rider Gotchard Short Anime: Gotcha the Seven Mysteries of Furasu High!TV★ 8.0
Houou Kaguya Quartz • 5 episodes
- 2024
- 2024Kamen Rider Gotchard Final Episode: You and Me, We've Got CHEMY×STORY - Director's Cut VersionFilm
Ho-Oh Kaguya Quartz / Kamen Rider Legend
- 2024Kamen Rider Gavv: Transformation LessonsTV
Ho-Oh Kaguya Quartz / Kamen Rider Legend (voice) • 1 episodes
- 2024
- 2024
- 2023★ 9.0
- 2023★ 7.0
- 2023
- 2023
- 2023
- 2023
- 2023
- 2023
- 2022★ 10.0
- 2022
- 2022
- 2021★ 10.0
- 2021
- 2019
- 2019
- 2018
- 2017
- 1971★ 6.5


































