- Portrayed by: Sakuragi Nachi
- First appearance
- Kamen Rider Zero-One 03
Amatsu Gai is a character in Kamen Rider Zero-One. He is the president of ZAIA Enterprise Japan.
Using the ZAIA Thousandriver, Gai transforms into Kamen Rider Thouser.
Kamen Rider Thouser
Using Progrise and Zetsumerise Keys with the ZAIA Thousandriver, Gai transforms into Kamen Rider Thouser.
Thouser is themed after the Arsinoitherium and Caucasus beetle.
Finisher - Thousand Destruction (サウザンドディストラクション)
Accessed by sliding the Awaking Arsino Zetsumerise Key and Amazing Caucasus Progrise Key into the Thousandriver.
Thouser's default form.
Equipped with the Thousand Jacker.