From 17 October to 15 November 2026, a digital stamp rally for “How to Walk Through the Mystery 2: The Mermaid Legend Murder Case” × Japan Heritage “Iza, Kamakura” will be held in Kamakura. Participants can receive original wallpaper by visiting 5 locations.
A digital stamp rally will be held at 5 locations in Kamakura: Eishoji Temple, Yuasa Bussankan, Sugimoto-dera Temple, Hokokuji Temple and the Former Kacho-no-miya Residence. Participants can collect stamps using their smartphone's location data and download original wallpaper reflecting the theme of each location.
After collecting the stamps, all 5 wallpapers, each different for its location, will be available for download. Participation is free. A GPS-enabled smartphone is required, and participation is available only through a web browser.