Two new castle robots have joined the Castle Combiner Oshirobots lineup. The original content series, developed by MIXI, Inc., has revealed Oshirobot Matsuyama Castle (the 23rd entry) and Oshirobot Kōchi Castle (the 24th entry). Both castle robots are now available to view on the official website. The project team will also be setting up booths at two spring events in April 2026, where fans can pick up exclusive novelties and merchandise.
Oshirobot Matsuyama Castle Joins the Battle
The Donjon's trunk is supported by the Nohara Turret at the waist, while the connected corner turrets — linked to the secondary keep that serves as a backpack — house massive arms: the defensive right Inui Turret and the offensive left Tsutsui Gate and Hidden Gate. Its finishing move, the "Phantom Crushing Fist" (幻影剛砕拳), strikes from a blind spot with overwhelming force. A castle robot built for both offense and defense, quietly sharpening its fangs for a counterattack.
For full details, visit the official Oshirobot Matsuyama Castle page: https://oshiro-robots.com/oshiro-robots/matsuyamajo/
Oshirobot Kōchi Castle Joins the Battle
The main keep and the honmaru palace form the body, with surviving turrets and gates making up the rest of the frame. The mantle draped across its back symbolizes the pride and dignity of the Yamauchi clan. When a terrifying swell rises, the awakened roar of the great whale of the Southern Sea is unleashed — the "Suigei Senpa Dōtōgeki" (酔鯨千波・怒濤撃) — a strike that swallows everything whole. A castle robot drunk on history and sake, equal parts eccentric and passionate.
For full details, visit the official Oshirobot Kōchi Castle page: https://oshiro-robots.com/oshiro-robots/kochijo/
Event Booth Details
Matsuyama Spring Festival (Oshiro Matsuri) — Booth Appearance
Event: Matsuyama Spring Festival (Oshiro Matsuri) — https://www.matsuyama-jc.or.jp/2026harumatsuri/
Dates:
- Saturday, April 4, 2026: 11:00 AM to 8:30 PM
- Sunday, April 5, 2026: 11:00 AM to 4:00 PM
Venue: Shiroyama Park, Horinouchi District — "Umai Mon Fes West Area"
Freebies:
- Special trading card
- Original leaflet/booklet
- A4 cotton tote bag
Merchandise on sale:
- [NEW] Oshirobot Matsuyama Castle goshuin (castle stamp): ¥300 (tax included)
- Castle Stamp Book Mk-II: ¥3,500 (tax included)
- Muffler Towel: ¥2,200 (tax included)
- Logo T-shirt: ¥2,800 (tax included)
SNS Campaign: Follow the official Castle Combiner Oshirobots social media account at the booth to enter a lottery. Prizes include a special Amazon Gift Card worth ¥1,046 (1st prize), a special marché bag M-size (2nd prize), and a logo sticker as a participation gift.
Kochi Anikuri Festival 2026 — Booth Appearance
Event: Kochi Anikuri Festival 2026 — https://www.combank.co.jp/KochiAnikuri/
Dates:
- Saturday, April 11, 2026: 12:00 PM to 5:00 PM
- Sunday, April 12, 2026: 12:00 PM to 5:00 PM
Venue: Obiyamachi Shopping Street (Obiyamachi 2-chome, Kochi City)
Freebies:
- Special trading card
- Original leaflet/booklet
- A4 cotton tote bag
Merchandise on sale:
- [NEW] Oshirobot Kōchi Castle goshuin (castle stamp): ¥300 (tax included)
- Castle Stamp Book Mk-II: ¥3,500 (tax included)
- Muffler Towel: ¥2,200 (tax included)
- Logo T-shirt: ¥2,800 (tax included)
SNS Campaign: Follow the official Castle Combiner Oshirobots social media account at the booth to enter a lottery. Prizes include a special Amazon Gift Card worth ¥1,046 (1st prize), a special marché bag M-size (2nd prize), and a logo sticker as a participation gift.
For the latest news and updates, check the announcements page on the official Castle Combiner Oshirobots website or the official X account (@oshiro_robots).
About Castle Combiner Oshirobots
Castle Combiner Oshirobots (https://oshiro-robots.com/) is an original content series that reimagines Japan's distinctive and fascinating castles under the concept of "what if actual castles transformed and combined into giant robots." The series launched in December 2022 with three castle robots — Kumamoto Castle, Takamatsu Castle, and Aizu-Wakamatsu Castle — along with a short anime directed by Masami Obari. Beginning with the UNESCO World Heritage and National Treasure Himeji Castle in March 2023, the lineup has expanded to include robots based on Fukuyama, Nagoya, Matsumoto, Okayama, Bicchu-Matsuyama, Odawara, Wakayama, Tsuyama, Kishiwada, Shimabara, and Hikone castles, followed in 2025 by Hiroshima, Marugame, Goryokaku, Matsue, Osaka, Kokura, and Fukui castles. More castle robots from across Japan are planned for the future.
