- Country: Japan
- Genres: Action, Fantasy, Sci-Fi
- Release: 2018-08-04
- Director: Kazuya Kamihoriuchi
- Writers: Shogo Muto
- Language: Japanese
- Stars: Atsuhiro Inukai , Atsuhiro Inukai , Kaho Takada , Eiji Akaso , Eiji Akaso , Kouhei Takeda , Kouhei Takeda , Yuki Ochi , George Kokubo , Yukiaki Kiyama , Takashi Fujii , Rena Matsui , Koharu
- Runtime: 66 min
- Awards: N/A
- AKA: 劇場版 仮面ライダービルド ビー・ザ・ワン (Japan) , Kamen Rider Build: Be the One , Kamen Rider Build: Be the One (United States of America) , Kamen Rider Build: Be the One (United Kingdom) , Gekijôban Kamen Raidâ Birudo: Bî za wan
- Plot:
After the end of the civil war that tore apart Japan, the new governors of Touto, Hokuto and Seito work together to reunify the country. However, they are actually members of an extraterrestrial race called the “Blood Tribe” (the same species as Evolto), who assumed their government positions as part of a plan to destroy Earth as they have done to Mars and other planets before. Considering Sento Kiryū (Kamen Rider Build) a major threat to their plans, the Blood Tribe manipulates his friends and other civilians into attacking him. With even his close ally Ryūga Banjō (Kamen Rider Cross-Z) now against him, Sento must fight to survive and stop the Blood Tribe’s plan from succeeding.
- IMDB:tt8591008
Kamen Rider Build: Be the One Cast · · · ALL
Kazuya Kamihoriuchi
Director
Kaho Takada
Misora Isurugi
Kouhei Takeda
Kazumi Sawatari · Kamen Rider Grease
Takashi Fujii
Mitsuomi Goubara · Zebra Lost Smash
Rena Matsui
Ryouka Saiga · Scissors Lost Smash
Tetsuo Kanao
Evolto / Kamen Rider Evol (voice)
Sora Amamiya
Belnage (voice)
Yukari Taki
Sawa Takigawa
Yasuyuki Maekawa
Souichi Isurugi · Kamen Rider Evol
Masanobu Katsumura
Kengo Inou · Kamen Rider Blood
Katsuya Kobayashi
Build Driver (voice) (uncredited)
Norio Wakamoto
Sclash Driver (voice) (uncredited)