Nariaki Utsumi appears to help Build prepare for the proxy battle with Grease. This chapter takes place immediately after Sento obtains the Fullbottles from Hokuto and Seito in Episode 21, but one week prior to the scene where Build charges at Grease at the proxy duel.
| Title | Kamen Rider Build: Raising the Hazard Level ~7 Best Matches~ - Season 1 Episode 1 First Chapter |
|---|---|
| Year | 2018 |
| Genre | Action & Adventure, Sci-Fi & Fantasy, Drama |
| Country | Japan |
| Studio | YouTube |
| Cast | Atsuhiro Inukai, Yuki Ochi, Katsuya Kobayashi, Kaho Takada |
| Crew | Nobuhiro Suzumura (Director), Shogo Muto (Supervising Producer), Yoshimasa Akamatsu (Writer) |
| Alternative Titles | Kamen Raidā Birudo Hazādoreberu o Ageru Nanatsu no Besuto Matchi, Kamen Rider Build: Raising the Hazard Level |
| Keyword | monster, training, superhero, scientist, super power, scientist hero, based on tv series |
| First Air Date | Feb 05, 2018 |
| Last Air date | Apr 30, 2018 |
| Season | 1 Season |
| Episode | 3 Episode |
| Runtime | 20:14 minutes |
| Quality | HD |
| IMDb: | 8.00/ 10 by 2.00 users |
| Popularity | 1.0136 |
| Language | Japanese |
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