[New from I-KU-KAN] Immersive Experience Game 'Naisho no Monoire' Set in Nihonbashi Kabutocho Starts April 17 (Fri)

Kyujitsu Hack Inc. (Headquarters: Taito-ku, Tokyo, President and CEO: Kazuki Tanaka) has jointly planned and produced the immersive experience game "Naisho no Monoire" by I-KU-KAN, together with Heiwa Real Estate Co., Ltd. (Headquarters: Chuo-ku, Tokyo, Representative Executive Officer and President: Kiyoyuki Tsuchimoto).

"Naisho no Monoire" is a city walk experience that begins with the free mystery puzzle "Kabutocho Mystery City Tour 2026" and leads the story in unexpected directions. Enjoy solving puzzles by following clues scattered throughout the city while taking in the scenery, buildings, and monuments of Nihonbashi Kabutocho. The on-site exchange is scheduled to start on Friday, April 17, 2026.

1 What is 'Naisho no Monoire'?

Synopsis

A second-grade elementary school girl chasing a mysterious man named "Kawanishi".

She had packed everything into one drawstring bag.

You pick up her dropped "Naisho no Monoire" (secret bag).

Untie the drawstring. Follow the contents. Take action.

※ There are no intense horror elements.

Planning Details Page: https://i-ku-kan.com/naisho

2 Event Period

Friday, April 17, 2026 – Sunday, April 18, 2027

3 Sales Period

Friday, April 10, 2026 – Sunday, April 18, 2027, until 18:00

※ Early sell-outs may occur depending on stock status.

※ For the latest information, please check the Naisho no Monoire website (https://i-ku-kan.com/naisho).

4 Required Time and Sales Price for Experience Kit

Required Time: Approx. 2.5 hours~

Price: 3,300 Yen (tax included)

※ The required time includes the experience time for "Kabutocho Mystery City Tour 2026".

5 Participation Method and How to Purchase the Experience Kit