A Unique Game Based on Trading Cards of Japanese Islands Launches

In an exciting collaboration, Atoria LLC, which operates the specialized media outlet 'Hanarejima', has teamed up with Zenrin Co., Ltd. to bring a unique opportunity for island lovers and game enthusiasts alike. This partnership has led to the creation of the trading card series 'Map Design GALLERY CARD/有人離島', featuring Japan’s inhabited islands. To enhance this collaboration, a rulebook for a one-of-a-kind game named 'ShimaJack' has been developed, set to be released on July 3, 2026.

What is 'ShimaJack'?

The game 'ShimaJack' takes an innovative twist on classic card gaming by inviting players to estimate the population density of various islands based on the trading cards. The objective is to approach the number of inhabited islands in Japan, which counts to 417. Participants can leverage their analytical skills regarding geographical features or simply rely on luck. This unique approach makes 'ShimaJack' accessible to both seasoned island fanatics and novices alike, providing a casual yet engaging gaming experience.

The rulebook will be included with the corresponding product packs and will also be available online as a digital version. Participants and readers alike can also look forward to exclusive articles that showcase gameplay experiences, further celebrating the charm of island trading cards alongside hands-on play.

About 'Map Design GALLERY CARD/有人離島'

This trading card series is crafted around Japan's inhabited islands, showcasing essential details like maps, land area, and population statistics. The card designs feature silhouettes that emphasize the unique shapes of the islands, allowing cardholders to appreciate the diverse topography of the area. Following its debut in July 2025, this series has garnered considerable attention, with sales exceeding 180,000 cards by May 2026. The upcoming fourth wave of releases in July will feature cards from Okinawa, Amami, and Ogasawara, thereby completing a total of 304 islands (excluding Iwo Jima and Minami Torishima).

Distribution of the Rulebook

The rulebook will be available for distribution with the 'Map Design GALLERY CARD/有人離島' pack starting from July 3, 2026. Customers who purchase the related series (packs, complete boxes, and set items) will receive the rulebook at no additional cost while supplies last. The promotional period for the online store will last from July 3 to July 10, 2026. However, conditions and availability may change at any time without prior notice.

Inspiration Behind the Collaboration

The islands of Japan are rich with stories, geography, culture, and history, which serve as the foundation for stunning interactions with the natural world. This game initiative represents a significant effort to connect people with the fascinating aspects of the islands, not just through knowledge but also through experiential play. The collaboration demonstrates how diverse topics such as geography, design, and gaming can interconnect and expand into areas like homes, educational institutions, and community events.

Moving forward, Hanarejima aims to continue exploring these new avenues, creating more opportunities to learn about and appreciate the beauty of Japan's islands.

About Hanarejima

Launched by a team of enthusiasts in the spring of 2024, Hanarejima focuses on delivering practical information and interviews about Japan's inhabited islands, which number more than 400. With experience in island activities and collaboration with local businesses, the team of writers, designers, and engineers seeks to approach the island's challenges from a creative perspective. For more information, visit Hanarejima's website and their official Instagram.

About Map Design GALLERY

Zenrin Co., Ltd. operates the Map Design GALLERY brand that offers map-themed stationery and lifestyle goods. Aimed at providing innovative and enjoyable ways to engage with maps, their product range includes stationery, bags, fashion items, accessories, and home décor. For further exploration, check out their online store as well as their official Instagram page.