# Department of Past Investigations
_過去干渉課_

- **When:** Fri, Oct 2, 2026 – Sun, Jan 17, 2027 (JST)
- **Where:** Tokyo Dome City, Bunkyo — 1-3-61 Koraku, Bunkyo-ku, Tokyo
- **Map:** https://www.google.com/maps/search/?api=1&query=35.704961,139.7525594
- **Price:** ¥2,500
- **Category:** Shows & Entertainment
- **Official site:** https://i-ku-kan.com/kakokansyouka
- **On Tokyo Events:** https://eventstokyo.com/en/events/department-of-past-investigations

![](https://storage.googleapis.com/production-os-assets/assets/e6369042-7f0b-43e3-be18-25097a26f709)

An immersive, city-wide adventure game set in Tokyo Dome City. Participants act as investigators from the 'Department of Past Investigations,' exploring the city to help clients seeking answers to unresolved regrets or mysteries from their past. The experience offers two main courses: 'Event Investigation,' where you research clients' past events, and 'Puzzle Investigation,' which focuses on unraveling secrets of an unpublished puzzle story. Completing both courses unlocks the 'Truth Investigation,' revealing the story's ultimate mystery. The combined experience takes over five hours, allowing players to fully immerse themselves in the narrative world.

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Source: Tokyo Events — https://eventstokyo.com/en/events/department-of-past-investigations