Nobunaga’s Ambition: Shinsei × Odawara Castle Collaboration Event
Odawara Castle Collaboration
From August 11 to 17, 2026, we held a collaboration event between the smartphone game Nobunaga’s Ambition: Shinsei and Odawara Castle. We planned and operated an event that linked the in-game “Battle for Odawara Castle” with on-site programs at Odawara Castle and outdoor advertising at Odawara Station and the castle.
Project Overview
Odawara Castle was the seat of the Hojo clan and the site of Uesugi Terutora’s (later Kenshin’s) attack on Odawara. Because it is also the setting of the in-game PK season “Shiyu Doto,” we set the theme as “Hojo Ujiyasu vs. Uesugi Terutora.” We designed the event so that the outcome for the side players supported in the game was reflected in the on-site advertising.
Key Initiatives
- In-game “Battle for Odawara Castle”: a head-to-head format in which players chose a warlord to support and collected support points through missions, with rewards distributed based on the outcome
- Following the battle’s outcome, the posters inside the castle keep were switched to visuals of the winning side’s warlord from August 18 to 24
- At a special booth in front of the Odawara Castle keep: 30% off coupons for keep admission, giveaways of collaboration-exclusive uchiwa fans, and a prize drawing
- Free collaboration-exclusive castle seals (gojoin) for keep visitors, plus a themed photo spot
- Outdoor advertising at Odawara Station (Central Free Passage, West Exit stairs, East Exit stairs) and around Odawara Castle
- A social media campaign for photographing the outdoor ads and posting them on X
| Title | Nobunaga’s Ambition: Shinsei |
|---|---|
| Venue | Odawara Castle (Odawara, Kanagawa), Odawara Station |
| Period | August 11–17, 2026 (keep posters switched through August 24) |
| Our role | Event planning and operation |