Project for "Wearable Special Low-Temperature Cold Packs" to Change the Norms of Heatstroke Countermeasures Kicks Off in Earnest! Latest Cooling Gear from a Consortium of Leading Japanese Companies to Be Unveiled for the First Time by Four Companies at the 12th Tokyo Heatwave Countermeasures Expo

Sato Sangyo Co., Ltd. (Chiyoda-ku, Tokyo), a member of the Nikke Group, has launched the next-generation cooling project "WILL-ICETECH Advance" in alliance with WILLTEX Inc. (Headquarters: Yokohama, Kanagawa), which aims to solve social issues through temperature, and major companies supporting their respective industries.

This project is a powerful corporate alliance formed by WILLTEX Inc., Shuto-ko Maintenance Kanagawa Co., Ltd. (Shuto-ko Group), Marusa Co., Ltd. (Toray Group), and Sato Sangyo Co., Ltd. (Nikke Group), who are professionals in infrastructure maintenance, textiles, and manufacturing.

The Alliance "WILL-ICETECH Advance" Tackles the Harsh Summer

[Joint Research Adopted by the Tokyo Fire Department]

Joint research and development of a cooling vest for firefighting activities using "wearable special low-temperature cold packs," which this project is promoting, has been adopted by the Tokyo Fire Department.

"WILL-ICETECH Advance's" "Wearable Special Low-Temperature Cold Packs"

Regarding Adoption of Joint Research by the Tokyo Fire Department

In recent years, the number of emergency transports due to heatstroke during Japanese summers has been on a continuous rise, making the safety of field workers a critical social issue. The research and development of a "cooling vest for firefighting activities" utilizing WILLTEX's special cooling technology has been adopted as a joint research and development theme for the Tokyo Fire Department INNOVATION PROJECT.

This joint research and development aims to advance heatstroke countermeasures in firefighting activities by incorporating the knowledge of the Tokyo Fire Department and utilizing the technologies of Shuto-ko Maintenance Kanagawa Co., Ltd. and WILLTEX.

The special cooling technology used in this joint research and development is a common technology also employed in the special low-temperature cold pack products offered by the alliance companies.

Tokyo Fire Department INNOVATION PROJECT Contract Signing Ceremony

▶ Click here for details on the contract signing ceremony for joint research and development (Shuto-ko Maintenance Kanagawa Co., Ltd.)

Regarding Joint Exhibition at the 12th Tokyo Heatwave Countermeasures Expo

At the joint exhibition booth, in addition to explanations of the cutting-edge technologies related to the joint research and development with the Tokyo Fire Department, the actual products developed by each company will be unveiled and exhibited all at once.

A demo area will be available for visitors and members of the press to actually wear the products and directly experience their cooling performance.

Exhibited Products and Participating Companies

"ICE ARMOR®"

"ICE ARMOR®," the wearable ice armor

Total Sales Distributor: Shuto-ko Maintenance Kanagawa Co., Ltd. (Shuto-ko Group) / Manufacturing Planning: WILLTEX Inc.

This "wearable ice armor" boasts the industry's largest cooling area (25cm x 25cm). Its unique technology, where non-polymer liquid circulates inside to absorb heat, achieves stable cooling for up to approximately 8 hours. It supports safety assurance in harsh environments under the blazing sun, such as the maintenance of expressways.

"FROZEN CORE®"

"FROZEN CORE®," the wearable cold pack

Distribution: Sato Sangyo Co., Ltd. (Nikke Group)

Features a 2-way special low-temperature cold pack that can switch between 0°C (instant cooling) and 5°C (sustained cooling), along with stretch mesh wear (available in 4 sizes). It is suitable for a wide range of applications, from construction and logistics sites to schools, club activities, and everyday use.

"WONDER ICE®"

"WONDER ICE®" featuring Toray's unique "Summer Shield®" special three-layer structure fabric

Distribution: Marusa Co., Ltd. (Toray Group)

Toray's unique "Summer Shield®" special three-layer structure fabric is used in the cold pack pocket. This high-performance material, which provides heat shielding above -4°C, 99.99% light-shielding rate, and 99% UV cut rate, blocks external air and enhances the cooling duration of the unique 19-layer structure cold pack.

Exhibition Overview

Exhibition: 12th Tokyo Heatwave Countermeasures Expo

Dates: July 15 (Wed) - July 17 (Fri), 2026

Venue: Tokyo Big Sight, East Hall 8, Booth No. 8-E10

Exhibitors: Shuto-ko Maintenance Kanagawa Co., Ltd., Sato Sangyo Co., Ltd., Marusa Co., Ltd., WILLTEX Inc.

▶ Details of the 12th Tokyo Heatwave Countermeasures Expo here

Product Information Download

For details on each product, please refer to the product flyers (PDF) below.

ICE ARMOR® Product Flyer [PDF Download]

FROZEN CORE® Product Flyer [PDF Download]

WONDER ICE® Cold Pack Product Flyer [PDF Download]

WONDER ICE® Vest Product Flyer [PDF Download]