Shaping the Future of Nuclear Energy
Together with Graphite

Thank you for participating in the 26th International Nuclear Graphite Specialists Meeting (INGSM-26).The INGSM-26 conference was hosted by Toyo Tanso Co., Ltd. and the Japan Atomic Energy Agency (JAEA).

INGSM-26 opened with two keynote lectures: Toyo Tanso’s Contributions to High-Temperature Gas Reactors and Future Prospects presented by Toyo Tanso, and Overview of HTGR Project in JAEA presented by JAEA. The conference featured seven technical sessions covering the latest developments in nuclear graphite science, technology, manufacturing, characterization, irradiation behavior, and reactor applications.

In conjunction with the conference, an exhibition was held featuring organizations and companies active in the nuclear graphite and nuclear energy sectors. The exhibition provided participants with an excellent opportunity to learn about the exhibitors’ activities, technologies, and services, while also fostering valuable discussions and networking among attendees and exhibitors.

The meeting provided valuable opportunities for researchers, industry representatives, government organizations, and students from around the world to exchange knowledge, discuss current challenges, and explore future directions for nuclear graphite and high-temperature gas reactor technologies.

Through the presentations, discussions, and exchanges throughout the week, INGSM-26 further strengthened the international nuclear graphite community and fostered new opportunities for collaboration across academia, industry, and research organizations. We look forward to seeing you again at the next INGSM.

Thank you once again for your participation and support.

The INGSM-26 Organizing Committee

The International Nuclear Graphite Specialists Meeting (INGSM) was inaugurated in 2000 at the Oak Ridge National Laboratory in Tennessee, USA. Since then, it has been held annually in various countries, attracting leading experts, researchers, and industry professionals from around the world.

The conference serves as a global platform for presenting and discussing the full lifecycle of nuclear reactor-grade graphite, including its application in graphite-moderated reactor design, operation, and decommissioning. Through technical exchanges and collaborative dialogue, INGSM fosters the advancement of next-generation research and development in nuclear graphite technologies.

In 2026, INGSM will return to Japan for the first time in 23 years since its last hosting in 2003. The event will be co-organized by Toyo Tanso Co., Ltd. (*1) and the Japan Atomic Energy Agency (JAEA) (*2), with expected collaboration from The International Atomic Energy Agency (IAEA).

The most recent meeting was held in September 2025 at the IAEA Headquarters in Vienna, Austria, with approximately 120 participants in attendance.

Osaka, the host city for INGSM-26, offers excellent accessibility via Kansai International Airport and is renowned for its rich cultural heritage, diverse cuisine, and vibrant entertainment scene. As a dynamic international city, Osaka provides an ideal setting for global scientific exchange.

We warmly invite participants from across the globe to join us at INGSM-26—a valuable opportunity for international collaboration and knowledge sharing in the field of nuclear graphite.