
Acting
Jul 8, 1998
Shizuoka Prefecture, Japan
Seiichiro Nagata
Acting
Biography
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.
Feature Films (25)

Eight Touken Danshi visit Tokyo throughout time as they are trapped between an alternative timeline and the one history remembers.
Touken Ranbu: The Musical -Tokyo Kokoro Oboe-

The first musical adaptation of the anime Pretty Boy Detective Club, known in Japan as Bishōnen Tanteidan.
Labyrinth Opera: Pretty Boy Detective Club

College student Yakumo Saito can see ghosts with his red left eye. Associate professor Gakuto Mikoshiba is a genius mathematician. When a ghost begins possessing students at the college, the two must team up to discover the truth of what's going on.
Psychic Detective Yakumo: Bias of Thought

Kotegiri Gou leads seven other Touken Danshi in making a stage production of Nanso Satomi Hakkenden.
Touken Ranbu: The Musical Gou on Stage ~Shinpen Satomi Hakkenden~

Houtaro and friends are suddenly attacked by Glion. As they struggle against enemies that appear one after another from a space-time gate, they discover that enemies have been sent from the future! To protect the present and the future, Houtaro and Rinne travel through time and space to the devastated future. Thus the final battle, with everything on the line, finally begins!
Kamen Rider Gotchard: The Future Daybreak
![Brain Crash Theatre [Dramatical Murder]](/_next/image?url=https%3A%2F%2Fimage.tmdb.org%2Ft%2Fp%2Fw500%2F9b3D6L42yQWrKrludIUhl0H3FaZ.jpg&w=3840&q=75)
DRAMAtical Murder, a popular BL game released by Nitro+CHiRAL in 2012, is an adventure game set on the remote island of Midorijima in the future, and the story branches depending on the choices you make. Even in this stage, the story diverges from the middle! In each episode, a story focuses on the characters of Kojaku, Noise, Mink, Clear, and Ren.
Brain Crash Theatre [Dramatical Murder]

The Director's Cut version of Kamen Rider Gotchard's final episode, "This is My and Your CHEMY×STORY". It will features new scenes not seen in the original TV broadcast.
Kamen Rider Gotchard Final Episode: You and Me, We've Got CHEMY×STORY - Director's Cut Version

Ahead of No. 1 Sentai Gozyuger's premiere, in a conference room somewhere, Gokai Red, Zenkaizer, Kamen Rider Decade, Kamen Rider Legend, and Gozyu Wolf are sitting in a discussion table. They are engaged in a heated debate about whether Gozyuger should be recognized as an anniversary. What will be the outcome?!
No. 1 Sentai Gozyuger Anniversary Discussion

In the Special Cause of Death Department, six unusual shinigami tell the final stories of human's lives.
Nanashi: Seventh Special Cause of Death Department: The Stage

In the 15th century, Vlad III, king of Wallachia, was in deep despair after his beloved queen was killed in battle. He cursed God and vowed to live forever in the darkness to take revenge on the world. In the 19th century, Jonathan Harker, a novice lawyer, is asked by a Romanian aristocrat to help him buy a property in London. The aristocrat, who calls himself "Count Dracula," has an eerie aura about him, but also a mysterious charm that captures people's hearts. However, Harker soon learns that Count Dracula is actually a terrifying immortal vampire. After discovering the Count's true purpose, he and his friends rise up to stop it.
Anaden vol.2 "Nosferatu in the Mist - The Legend of Dracula"
Television & Series (8)

Houtaro is suddenly transported to a parallel world. Awaiting him is a young man named Houou Kaguya Quartz who summoned him using that world's technology, the Aurora Curtain System. His favorite phrase is "Gorgeous" and he protects the world from the clutches of the evil organization called "Hundred". What's more, the person following Kaguya is a butler named Butler, who looks exactly like Houtaro's friend Ryo Kajiki!
Kamen Rider Gotchard VS Kamen Rider Legend

In the Special Cause of Death Department, seven unusual shinigami tell the final stories of human's lives.
Nanashi: Seventh Special Cause of Death Department

Takeshi Hongo is a promising young man with a passion for motorcycle racing. However, his dreams are suddenly ruined when he gets kidnapped by Shocker, the evil secret organization planning to dominate the world. After being remodeled into a cyborg, Takeshi escapes and swears to protect the world from the inhuman monsters.
Kamen Rider

A mysterious alchemist studies and experiments to create "living creatures" called Chemies. Unfortunately, the cards holding them that should have been kept secret are accidentally unleashed on the world. High school student Houtarou Ichinose is tasked to retrieve all the Chemies released around the world. Using the Grasshopper Chemy, Hopper-1, and the Steam Locomotive Chemy, Steamliner, he transforms into Kamen Rider Gotchard!






