Joukaku Gattai Oshirobots
English title: Castle Combiner Oshirobots
Japanese title: 城郭合体オシロボッツ
Type: ONA
Source: Original
Episodes: 1
Status: Finished Airing
Aired: Dec 17, 2022
Duration: 2 min
Rating: PG-13 - Teens 13 or older
Genres: Action
Themes: Mecha

The project reimagines the historical castles in Japan as giant robots that transform and combine. In particular, the above short features the Kumamoto, Takamatsu, and Aizu-Wakamatsu Castles. A group of children and the Shirodama (the castles' souls, who are actually historical army commanders) join forces to pilot the castles.

(Source: ANN)