- Yuji Nakata will play Kamen Rider Geats. He previously played Kamen Rider Cronus, Kamen Rider Espada, and Kamen Rider Live.
- Eitoku will play Kamen Rider Tycoon. He previously played Kamen Rider Zanki, Kamen Rider Diend, Kamen Rider Accel, Kamen Rider Meteor, Kamen Rider Baron, Kamen Rider Necrom, Kamen Rider Snipe, Kamen Rider Cross-Z, Kamen Rider Blades, and Kamen Rider Vice.
- Yuki Miyazawa will play Kamen Rider Naago. She previously played Kamen Rider Sabela, Kamen Rider Calibur (Sophia), and Kamen Rider Jeanne.
- Yuya Nawata will play Kamen Rider Buffa. He previously played Kamen Rider Genm, Kamen Rider Geiz, Kamen Rider Zero-One, and Kamen Rider Revi.
Lastly, it was also announced that veteran suit actor Satoshi Fujita will serve as the show's action director, making this his first major project in said role. Prior to this, he served as assistant action director in Kamen Rider Saber episodes 44-48, Kamen Rider Revice episodes 13, 14, 41, and the Kamen Rider Geats portion of Kamen Rider Revice the Movie: Battle Familia. As a suit actor, some of his notable roles include: Mezool, Virgo Zodiarts, Kamen Rider Lazer, Kamen Rider Grease, Kamen Rider Valkyrie, and Kamen Rider Kenzan.
Kamen Rider Geats is set to premiere this September 4th only on TV-Asahi's Super Hero Time block, replacing Kamen Rider Revice.
[Additional details from Wikipedia JP]