TOPPAN and FANCL Test-Provide "Temperature Indicating Seal" to Waseda Jitsugyo High School Brass Band Members to Visualize Body Surface Temperature

TOPPAN Co., Ltd. (Headquarters: Bunkyo-ku, Tokyo; President and CEO: Haruhiko Noguchi; hereinafter "TOPPAN"), a group company of TOPPAN Holdings Inc., and FANCL Corporation (Headquarters: Yokohama, Kanagawa Prefecture; President and CEO: Hideki Mitsuhashi; hereinafter "FANCL") have jointly developed a "Temperature Indicating Seal" (hereinafter referred to as "this product") that visualizes changes in skin surface temperature by color, and are currently verifying it for practical application.

We have participated in the "Aquasolita® (※1) 'Cheering Heatstroke' Countermeasure Project (※2)" organized by Ajinomoto Co., Inc., and test-provided this product to members of the Waseda Jitsugyo High School brass band at a media presentation held on June 10, 2026.

This product is designed to change color according to temperature. When applied to the skin, it visualizes the rise in skin surface temperature, allowing for early detection of heat-related risks not only for those playing sports but also for those cheering, such as brass band members.

We will continue to verify the usefulness of this product, support awareness of heat-related risks in cooperation with schools, companies, and organizations, and aim for practical application of this product by June 2027.

Distribution of the "Temperature Indicating Seal" Left: Matsuda, New Business Promotion Department, Management Planning Division, FANCL Corporation Right: Nagai,部長 (Club President), Brass Band Club, Waseda Jitsugyo High School

■ Background

In recent years, heatstroke countermeasures have become increasingly important for society as a whole. However, while the significant heat-related risks for those cheering, such as brass band members, cheering squads, parents, and spectators, have been recognized, adequate measures have not been taken.

A survey by Ajinomoto Co., Inc. revealed that approximately one in two people cheering for sports outdoors have experienced symptoms considered to be heatstroke. It has also become clear that brass band members, in particular, operate in harsh environments, such as performing for long periods under the scorching sun and dealing with the glare from instruments (※3).

TOPPAN and FANCL developed this product, which changes color based on body surface temperature, based on skin-adhering film technology using TOPPAN's film manufacturing technology. They have been conducting verification for practical application, including a demonstration related to heatstroke countermeasures for elementary school students in Yokohama City in October 2024.

Against this background, both companies participated in the "Aquasolita® 'Cheering Heatstroke' Countermeasure Project" organized by Ajinomoto Co., Inc., and test-provided this product to members of the Waseda Jitsugyo High School brass band, who often perform in situations with high heat-related risks.

■ Product Overview

This product combines a skin-adhering film using TOPPAN's film manufacturing technology with special ink that changes color at a certain temperature. It is designed to start changing color from approximately 34°C and reach maximum color change at approximately 36°C. This allows for intuitive understanding of body surface temperature through the color change of the seal. Currently in the development and testing phase, we are proceeding with verification of its usefulness towards future practical application.

* Color change may vary depending on the individual.

Example of color change of the "Temperature Indicating Seal"

■ About the "Aquasolita® 'Cheering Heatstroke' Countermeasure Project"

The "Aquasolita® 'Cheering Heatstroke' Countermeasure Project" is an initiative by Ajinomoto Co., Inc. for its oral rehydration solution "Aquasolita®" series to raise awareness about heatstroke among "people who cheer" for sports outdoors, i.e., "cheering heatstroke." This project first focuses on brass bands, which are symbolic of "people who cheer," and ultimately aims to expand activities to protect "people who cheer" from "cheering heatstroke" in all situations, such as sports viewing, events, and school functions.

As the first phase of the project, Ajinomoto Co., Inc. conducted sampling of "Aquasolita®" at the "Koshien Brass Band Festival 2026" held on May 31. Following this, on June 10, a media presentation included a "Passionate Lecture on 'Cheering Heatstroke'" and an "Aquasolita® Presentation Ceremony" for the Waseda Jitsugyo High School brass band.

■ Future Development

Through participation in the "Aquasolita® 'Cheering Heatstroke' Countermeasure Project," TOPPAN and FANCL will disseminate the importance of recognizing heat-related risks not only for athletes but also for spectators, in cooperation with schools, companies, and organizations.

Furthermore, we will continue to verify the usefulness of this product, promote awareness of heat-related risks, and aim to put the product into practical use by June 2027 to support appropriate health management in hot environments.

※1 Oral rehydration solution provided by Ajinomoto Co., Inc.
※2 A project launched by Ajinomoto Co., Inc. to encourage preparedness by having oral rehydration solution readily available in case of heatstroke symptoms during cheering, such as heavy sweating or dizziness.
※3 Source: https://prtimes.jp/main/html/rd/p/000000169.000092524.html

* Product and service names mentioned in this press release are trademarks or registered trademarks of their respective companies.
* The content described in this press release is current as of the date of announcement and is subject to change without notice.

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