FANCL and TOPPAN Provide "Temperature Indicating Seal" to Waseda Jitsugyo High School Brass Band Members for Field Testing

FANCL Corporation and TOPPAN Co., Ltd. (Headquarters: Bunkyo-ku, Tokyo; President and CEO: Haruhiko Noguchi; hereinafter TOPPAN), a group company of TOPPAN HOLDINGS Co., Ltd., have jointly developed a "Temperature Indicating Seal" (pronunciation: shion seal; hereinafter the Product) that visualizes changes in skin surface temperature with color, and are currently verifying it for practical application. The companies participated in the "Aquasolita® (*1) 'Cheering Heatstroke' Countermeasure Project (*2)" organized by Ajinomoto Co., Inc., and provided the Product for field testing to the brass band members of Waseda Jitsugyo High School at a media presentation held on June 10, 2026.

The 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.

Going forward, the companies will continue to verify the usefulness of the Product, support awareness of heat-related risks in collaboration with schools, companies, and organizations, and aim for practical application of the Product by June 2027.

Left: Matsuda, New Business Promotion Department, Corporate Planning Division, FANCL Corporation
Right: Nagai,部长 (Club President), Brass Band Club, Waseda Jitsugyo High School

■ Background

In recent years, heatstroke countermeasures have become increasingly important across society. However, while the significant heat-related risks faced by not only athletes but also those who cheer, such as brass band members, cheerleaders, parents, and spectators, have been recognized, adequate measures have not been taken.

According to a survey by Ajinomoto Co., Inc., approximately one in two people who cheer 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 under the scorching sun for long periods and dealing with the glare from instruments (*3).

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

Against this backdrop, the two companies participated in the "Aquasolita® 'Cheering Heatstroke' Countermeasure Project" organized by Ajinomoto Co., Inc., and provided the Product for field testing to the brass band members of Waseda Jitsugyo High School, who frequently perform in situations with high heat-related risks.

■ Product Overview

The Product combines a skin-adhering film created using TOPPAN's film manufacturing technology with a special ink that changes color at a specific 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. The Product is currently in the development and testing phase, and its usefulness is being verified for future practical application.

* Color change may vary among individuals.

Example of color change for 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 countermeasures for people who "cheer" for sports outdoors, referred to as "cheering heatstroke." The project initially focuses on brass bands, a symbolic presence among "cheering people," with the ultimate goal of expanding activities to protect "cheering people" from "cheering heatstroke" in all situations, such as sports viewing, events, and school activities.

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

Furthermore, they will continue to verify the usefulness of the Product to promote awareness of heat-related risks, aiming for practical application by June 2027 to support appropriate health management in hot environments.

*1: An 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.