GS Yuasa Corporation (Tokyo Stock Exchange: 6674; “GS Yuasa”) today announced that lithium-ion batteries manufactured by GS Yuasa Group company GS Yuasa Technology Ltd. (“GYT”) have been installed on the first unit of the new transfer vehicle series “HTV-X1”.

HTV-X1 was launched on October 26, 2025, from the Tanegashima Space Center of the Japan Aerospace Exploration Agency (“JAXA”). It will remain berthed to the International Space Station (“ISS”) for up to six months to deliver cargo and load waste for disposal. Thereafter, it will depart the ISS and continue on-orbit flight for up to 1.5 years to conduct a variety of technology demonstration missions*1 . The batteries installed on HTV-X1 will supply power when the vehicle passes through Earth’s shadow and cannot receive sunlight.

GYT's space-use lithium-ion batteries*2  have been adopted in over 250 space vehicles worldwide since their orbital space verification in the early 2000s.
Their track record and performance capable of withstanding long-term operation in the high-vacuum space environment have been recognized, leading to their selection by Mitsubishi Electric Corporation, the company responsible for HTV service modules, since the first HTV, the predecessor to HTV-X1.
GYT develops, manufactures, and sells batteries and power supplies for special applications, delivering high-performance, high-quality batteries for special environments ranging from the depths of the ocean (6,500 meters below sea level) to the upper atmosphere (36,000 kilometers above sea level). We will continue to contribute to space development through the development and manufacture of high-performance lithium-ion batteries.

*1 For details on the functions, roles, and technology demonstration missions of HTV-X1, please refer to JAXA’s website:
    https://humans-in-space.jaxa.jp/htv/mission/htv-x1/
*2 This is a high-performance lithium-ion battery for space applications developed under a commission from JAXA and registered in the JAXA Component System (a system where JAXA's Research and Development Department develops components and devices commonly used in artificial satellites and registers them in the JAXA database for disclosure). For more details, please refer to the JAXA website.
    https://www.kenkai.jaxa.jp/eng/library/database/db-dccc.html