Japan Superconducting Applications Co., Ltd. Selected for Kanagawa Prefecture's R&D Project Toward a 2050 Carbon-Neutral Society

Japan Superconducting Applications Co., Ltd. (Headquarters: Chigasaki City, Kanagawa Prefecture; Representative Director: Masato Ohtsubo; hereinafter 'the Company') is pleased to announce its selection for the 'Fiscal 2026 Kanagawa Prefecture Carbon Neutral R&D Project Promotion Program' implemented by Kanagawa Prefecture. In response to the societal challenge of achieving carbon neutrality, the Company will advance technical verification of its proprietary flexible superconducting wire technology, jointly developed with the National Institute for Materials Science (NIMS), to contribute to viable solutions.

Overview of the Subsidy Program

Subsidy Name: Fiscal 2026 Kanagawa Prefecture Carbon Neutral R&D Project Promotion Program Selected Theme: Development Project of Low-Loss Coils for Fusion Reactors Using Flexible Superconducting Wire Subsidy Period: Until March 2027 Details: https://www.pref.kanagawa.jp/docs/sr4/prs/r6172919.html

About the Company's Technology and Products

The ultra-fine superconducting wire developed by the Company features high flexibility—comparable to copper wire—and low heat generation under fluctuating magnetic fields. Conventional superconducting wires are often tape-shaped or thick, making them difficult to bend and prone to high heat generation in dynamic magnetic environments. The Company's technology overcomes these limitations. In 2025, the Company was selected for Kanagawa Prefecture's R&D project supporting the realization of a carbon-neutral society by 2050. In March 2026, it announced the successful achievement of superconducting current flow in the world's smallest coil (※2) using MgB₂ ultra-fine R&W wire (※1).

Details of the Current R&D Project

Under this subsidized project, the Company will conduct the following technical verification:

- Demonstrate reduced heat generation under fluctuating magnetic fields—currently a major challenge in fusion experimental devices—using a coil with a diameter of approximately 1 meter.

Future Business Development

Based on the outcomes of this R&D, the Company plans to proceed toward full-scale demonstration tests by around 2030, using structures equivalent to those in fusion experiments. It will continue promoting social implementation in the energy sector, with a focus on contributing to carbon neutrality.

Comment from CTO Takeshi Nakayama

'This superconducting wire combines flexibility and ease of handling comparable to copper wire, significantly enhancing design freedom for superconducting applications. Last year, we prototyped and evaluated small coils to verify its mechanical flexibility. This time, we are challenging the demonstration of low heat generation—i.e., reduced AC losses—under alternating magnetic field conditions.'

About Japan Superconducting Applications Co., Ltd.

Japan Superconducting Applications Co., Ltd. is dedicated to manufacturing the world's finest and most flexible intermetallic compound superconducting wires and developing their applications, guided by the mission of 'contributing to global sustainability through superconducting technology.'

First venture to commercialize NIMS research outcomes, 19th NIMS Venture Established: February 2023 Headquarters: Chigasaki City, Kanagawa Prefecture Representative: CEO and President Masato Ohtsubo Business: Development and manufacturing of superconducting wires, and production and sales of coils and related products Official Website: https://www.cho-dendo.jp/

※1 R&W refers to the process of Reacting (thermal treatment to induce reaction) followed by Winding (coil formation). ※2 Based on internal research by Japan Superconducting Applications Co., Ltd.