Initial 200 Sets Sold Out in 90 Minutes: Immersive Mystery Game 'The Balthazar Stone' Launches in Japan

Mystery Game JAPAN (Edogawa-ku, Tokyo) has begun exclusive advance sales of the fully localized Japanese edition of 'The Balthazar Stone,' planned and manufactured by the British mystery game maker 'Mystery Agency,' via Makuake as of 10:00 AM on May 26, 2026. After the initial 200 sets sold out in 90 minutes, an additional batch of 200 sets will be available for purchase starting June 4 (Thursday).

Sales period: June 4, 2026 (Thursday) to July 6, 2026 (Monday).

[Product Features]
'The key to solving the mystery lies within the cursed treasure chest.'
This is an immersive mystery game box that begins when a 'cursed treasure chest left by the pirate Balthazar,' which had remained unsolved for centuries, is delivered to you.
You are the protagonist. Using information found inside and outside the box—such as newspapers, maps of deserted islands, broken mirrors, bird feathers, secret websites of famous UK universities, and archived newspaper sites—you will unravel the mysteries of who the pirate Balthazar was and what the 'cursed stone' truly is.
A major feature of this game is that the clues are centered around physical items. With high-quality items designed with a meticulous attention to texture, you can enjoy a full-scale real-world mystery game from the comfort of your home.

Furthermore, the puzzles, originally in English, have been fully localized into Japanese under the supervision of Natsuki Umino (Kenpi.), a renowned puzzle creator who has worked on numerous mystery projects.

[Makuake Advance Reservations]
Advance reservations are currently being accepted via the Makuake project page. Early-bird discounts of up to 20% are available.