Learn and Enjoy About Silkworms! Event Touring Popular Spots in Gunma Prefecture, Including a Stamp Rally, Held by DAISO "Mushi Jingu" Themed "Sanshu Sai" Starts July 25

A collaborative event themed around DAISO's original trading card game "Mushi Jingu" (蟲神器), titled "Sanshu Sai" (蚕蟲祭) Vol. 3 - Mushi Jingu: Tomioka Silk Mill Battle - will be held at World Heritage site "Tomioka Silk Mill" and other locations in Gunma Prefecture from Saturday, July 25, 2026, to Monday, August 31, 2026.

"Sanshu Sai" was first held as a collaborative event with Tomioka Silk Mill in the summer of 2025, prompted by the "Mushi Jingu Popular Insect Voting" held in 2025, where "Silkworm (Adult)" was voted number one. Starting from the second event, the scope expanded to the town of Tomioka. This third iteration will be a tour-style event covering Tomioka Silk Mill, Gunma Museum of Natural History, Konjac Park, Gunma Prefectural World Heritage Center Sekaito, and Gunma Safari Park, in addition to Tomioka Silk Mill. The event will feature plans that can be enjoyed not only by Mushi Jingu fans but also by families enjoying their summer vacation outings, such as the distribution of limited-edition cards, a stamp rally covering four locations with sticker distribution, face-in-hole photo panels, and the sale of collaboration sweets, as well as Mushi Jingu tournaments. For details, please refer to the official X account of the Sanshu Sai Executive Committee.

https://x.com/mushixtomioka

Main Events

Limited Edition Card "Silkworm Mouth Seal" Distributed at Tomioka Silk Mill

At Tomioka Silk Mill, a limited illustration version of the new card "Silkworm Mouth Seal," to be included in the 8th installment of "Mushi Jingu" scheduled for release in early autumn 2026, will be distributed.

*Scheduled for distribution during the event period, but distribution will end once the planned quantity is depleted.

Limited Sticker Distribution and Stamp Rally to Enjoy by Visiting Four Locations

At Gunma Museum of Natural History, Konjac Park, Gunma Prefectural World Heritage Center Sekaito, and Gunma Safari Park, different event-exclusive stickers will be distributed at each location. When four stickers are collected and arranged, they form a single illustration that can be enjoyed as a unified design.

A重ね押し (kasaneoshi - layered stamping) stamp rally, recreating the illustration of the popular Mushi Jingu card "Silkworm," will also be held at these four locations.

*Sticker distribution (one per person) and the stamp rally are free. Admission or usage fees may apply depending on the facility.

Face-in-Hole Panels and Photo Spots

・Gunma Museum of Natural History, Gunma Safari Park:

Event-exclusive face-in-hole panels

・Gunma Prefectural World Heritage Center Sekaito:

Photo spot where you can take pictures with real silkworms

・Café de Rome: Mushi Jingu collaboration sweets on sale

Image of face-in-hole panel

Mushi Jingu Exchange Meetings and Experience Sessions

・Free Exchange Meeting

Saturday, July 25 & Sunday, July 26, 9:30 AM - 4:00 PM. Free entry and exit for everyone. Tomioka Chamber of Commerce and Industry.

・Experience Session

Wednesday, August 12, 9:00 AM - 4:00 PM. Each session is 20-30 minutes, with a capacity of 8 people per session. Registration will be on a first-come, first-served basis on the day at the venue.

Tomioka Silk Mill, West Cocoon Storehouse.

・Mushi Jingu Tournament

Saturday, August 22, 1:00 PM - 6:30 PM. Tomioka Chamber of Commerce and Industry. Capacity: 64 people. *Participation applications have closed.

For details, please refer to the official X account of the Executive Committee. https://x.com/mushixtomioka

As a related exhibition for this event, a White Ant Specialty collaboration exhibition (exhibition related to wooden buildings and termite control / "guide pheromone" observation experience to learn about termite behavior for parents and children, etc.) will be held at the Tomioka Chamber of Commerce and Industry on July 25 and 26.

https://shiroari-senka.com/article/2940/

DAISO x Tomioka Silk Mill Collaboration Product Release Commemorative Present

During the Sanshu Sai period (starting July 25), the first 80 visitors to the Gunma Prefectural World Heritage Center Sekaito will receive the collaborative product "Rekishi o Manaberu Seal Book: Fuku to Sen'i" (History Learning Seal Book: Fukui and Fiber).

https://x.com/mushixtomioka/status/2070426928264380769?s=20

What is Mushi Jingu?

DAISO's "Mushi Jingu" is an original trading card game with insects as motifs, allowing players to become familiar with insects and nature while playing, and to deepen relationships with family and friends. In addition to popular insects such as rhinoceros beetles and stag beetles, it also features motifs of familiar insects like praying mantises, spiders, grasshoppers, and longhorn beetles, as well as rare insects found only overseas.

https://www.daiso-syuppan.com/mushijingi/

Daio Sangyo hopes that through this collaborative event "Sanshu Sai," people in the region will be able to enjoy and engage with "Mushi Jingu." Furthermore, through the event, we aim to contribute to conveying the charm of Tomioka City and Gunma Prefecture to many people.

"Sanshu Sai" Vol. 3 - Mushi Jingu: Tomioka Silk Mill Battle - Overview

Event Period: Saturday, July 25, 2026 - Monday, August 31, 2026

Locations: Tomioka Silk Mill, Tomioka Chamber of Commerce and Industry, Nakamachi Machinaka Exchange Hall, Gunma Museum of Natural History, Konjac Park, Gunma Prefectural World Heritage Center Sekaito, Gunma Safari Park, Café de Rome, and others.

Participation Fee: Free of charge, except for the tournament. However, admission/usage fees for each facility may apply.

Organizer: Sanshu Sai Executive Committee

Composition: Daio Sangyo, Daio Publishing, Yokoo Co., Ltd., Work Entry Co., Ltd., Machi no Works Co., Ltd., Tomioka City, Machizukuri Tomioka Co., Ltd., Tomioka City Tourism Association General Incorporated Association, Tomioka Chamber of Commerce and Industry, Gunma Prefectural World Heritage Center, Gunma Museum of Natural History, Yokoo Daily Foods Co., Ltd., Gunma Safari World Co., Ltd. (in no particular order)

Cooperation: Theoria House Clinic Co., Ltd.

*Implementation dates, participation methods, capacities, distribution conditions, etc., vary depending on the content.

*Distributed items will end once supplies are depleted.

About Daio Sangyo Co., Ltd.

Daio Sangyo operates under the corporate philosophy of "Enriching the lives of people worldwide with one price - Inspiring price, Inspiring quality -" and aims to be a global retailer originating from Japan, developing "DAISO," "Standard Products," and "THREEPPY," handling approximately 58,000 items ranging from daily necessities to hobby goods.

Company Profile

Company Name: Daio Sangyo Co., Ltd.

Representative: Yasuji Yano, President and Representative Director

Location: 1-4-14 Saijo Yoshiyuki Higashi, Higashihiroshima City, Hiroshima Prefecture

Established: December 1977

Capital: 2.7 billion yen

Number of Stores: 5,891 stores in 26 countries and regions including Japan (as of February 2026)

Sales: Consolidated 771.0 billion yen, Standalone 698.3 billion yen (February 2025 - end of February 2026)

[Inquiries from General Customers]

Event Executive Committee Secretariat, Yokowo Co., Ltd. (Contact: Onishi)

E-mail: [email protected]