Mitsui Fudosan and DeNA Co., Ltd. are jointly hosting an interactive mystery event, “The Light of Vows: An Experiential Mystery Tour of Nihonbashi,” using the AR app “Alpla.” The event will run from April 27, 2026 to March 30, 2027, in the Nihonbashi Muromachi area of Chuo Ward, Tokyo.
“Alpla” is a walk-through real-world experience app developed and operated by DeNA. By combining location information and augmented reality (AR), it provides an experience where real-world city walks intersect with digital narratives.
In this event, you’ll explore famous landmarks and spots in the Nihonbashi area to unravel the mystery of an incident that occurred there, obtaining scenarios and progressing through the story. By using augmented reality (AR) and location information with your smartphone camera, the world of the story will be linked to the actual cityscape. The estimated time to complete the event is 3 to 5 hours.
This event also features a collaboration with the mystery novel series “Kaga Kyoichiro Series” (by Keigo Higashino). Detective Kaga Kyoichiro, from the series which includes works set in Nihonbashi such as “Newcomer” and “The Wings of the Kirin,” will appear in an original story for the app.
To participate, you need to install the AR app “Alpra”. It is compatible with both iOS and Android, and requires location services and camera functions to be enabled. The operating environment is iOS 15.0 or later, or Android 8.0 or later with AR Core support.
“A Experience Mystery Around Nihonbashi: Light The of Vows” – Overview
| Event Name | An experiential mystery exploring Nihonbashi: Light The of Vows |
| Event period | April 27, 2026 – March 30, 2027 |
| venue | Nihonbashi Muromachi area (Chuo Ward, Tokyo) |
| Duration | 3-5 hours (approximate) |
| Apps used | Alpra (iOS / Android) |
| Special website | https://lp.arplat.jp/chikai/ |
This article is an English translation of an original Japanese article, translated by the Mogura VR editorial team.
Reference
https://prtimes.jp/main/html/rd/p/000001046.000051782.html
