SHI Accelerator Service Ltd.

SHI Accelerator Service Ltd. (SAS), known in Japanese as 住重加速器サービス株式会社, is a Japanese service company dedicated to accelerator-related operations and maintenance. It was established on 20 March 1985 and is wholly owned by Sumitomo Heavy Industries, Ltd. Its registered head office is at 7-1-1 Nishi-Gotanda, Shinagawa-ku, Tokyo, and its stated mission is to contribute to customers and society by providing services connected with accelerators, as its corporate name suggests. The company's business is built around the lifecycle support of accelerator and related equipment. Its service catalogue covers operation and management, inspection, repair and installation, maintenance and improvement, radiation-controlled-area management, and the sale of parts and consumables. For PET systems it handles cyclotron operation and daily inspection, synthesis-device operation and daily inspection, hot-lab room management and operation, and the sale of consumables and measuring instruments. Its product information page highlights medical devices — the labelled-RI production systems needed for PET examinations, proton-beam therapy systems and BNCT therapy systems — alongside a consumables sales business that includes made-to-order items. SAS operates a nationwide branch network in Japan, with offices in Hokkaido, Tohoku, Kanto, Chubu, Hokuriku, Kansai, Shikoku and Kyushu, plus a Radiation Management Service Centre in Keihanna (Kansai Science City, Kyoto Prefecture). Its Kansai office relocated to the Yodoyabashi Gate Tower in Osaka in 2026. The company reported fiscal-2025 sales of 4.6 billion yen and 250 employees as of 1 January 2026, with stated capital of 30 million yen as of 1 April 2025. Its representative director and president is Takuzo Morita. Quality and compliance credentials include ISO 9001:2015 and ISO 13485:2016 certification, a Tokyo Metropolitan Government construction-business licence covering civil engineering, electrical, water-supply facility, tobi/earthworks, machinery installation and demolition work, and a worker-dispatch business licence obtained under the Worker Dispatch Act. In 2026 the company announced it had received that dispatch licence, and it was also certified as a Health and Productivity Management Outstanding Organisation (small and medium-sized enterprise category) for 2026 by the Ministry of Economy, Trade and Industry and the Japan Health Council. It also maintains a health-management declaration centred on employee wellbeing.

SHI Accelerator Service Ltd. was established on 20 March 1985 as a Japanese company dedicated to accelerator-related services. It is wholly owned by Sumitomo Heavy Industries, Ltd., the heavy-machinery and precision-equipment group whose accelerator and medical-device businesses include cyclotrons, PET systems and particle-therapy equipment. The subsidiary was created to handle the operation, maintenance and radiation-management work that surrounds such installations, allowing customers to focus on their clinical, research or production missions. Over the following decades the company built a nationwide service footprint in Japan. Its branch network now spans Hokkaido, Tohoku, Kanto, Chubu, Hokuriku, Kansai, Shikoku and Kyushu, and it operates a dedicated Radiation Management Service Centre in Keihanna, Kyoto Prefecture, within the Kansai Science City area. This structure supports accelerator facilities, PET facilities and proton-beam therapy sites across the country. Its service portfolio evolved from basic accelerator operation and inspection into a broader offering that includes installation and repair, maintenance and improvement, radiation-controlled-area management, parts and consumables sales, and technical staffing. For PET operations it covers cyclotron and synthesis-device operation and daily inspection, hot-lab management and the sale of consumables and measuring instruments. Its product information also presents medical devices such as PET labelled-RI production systems, proton-beam therapy systems and BNCT therapy systems. By the mid-2020s the company reported fiscal-2025 sales of 4.6 billion yen and 250 employees as of 1 January 2026, with stated capital of 30 million yen as of 1 April 2025. It holds ISO 9001:2015 and ISO 13485:2016 certifications and a Tokyo Metropolitan Government construction-business licence covering civil engineering, electrical, water-supply facility, tobi/earthworks, machinery installation and demolition work. In 2026 it obtained a worker-dispatch business licence under the Worker Dispatch Act, announced the relocation of its Kansai office to the Yodoyabashi Gate Tower in Osaka, and was certified as a Health and Productivity Management Outstanding Organisation 2026 in the small and medium-sized enterprise category. It also maintains a health-management declaration and a mission that includes pursuing the healthy growth of all employees through its business.

• SHI Accelerator Service Ltd. is established.

• Stated capital of 30 million yen as of this date.

• Employee count of 250 as of this date.

• Certified as Health and Productivity Management Outstanding Organisation 2026 (SME category).

• Kansai office relocates to Yodoyabashi Gate Tower, Osaka.

• Obtains worker-dispatch business licence under the Worker Dispatch Act.

• An SAS employee participates in a RIKEN joint research team.

A specialist accelerator-service provider within the Sumitomo Heavy Industries group, supporting medical and research accelerator facilities in Japan with operation, maintenance, radiation management and technical staffing.

• Accelerator operation and management services

  Operation and management of various accelerators and related equipment.

• Accelerator inspection and repair services

  Inspection, repair and installation of accelerators and related equipment.

• Radiation-controlled-area management

  Management of radiation-controlled areas for accelerator and PET facilities.

• PET cyclotron and synthesis device operation

  Operation and daily inspection of cyclotrons and synthesis devices for PET systems.

• Hot lab management and operation

  Management and operation of hot lab rooms for PET radiopharmaceutical production.

• Consumables and measuring instrument sales

  Sale of consumables, measuring instruments and made-to-order items.

• PET labelled-RI production systems

  Medical device systems for producing labelled radiopharmaceuticals needed for PET examinations.

• Proton-beam therapy systems

  Medical device systems for proton-beam cancer therapy.

• BNCT therapy systems

  Medical device systems for boron neutron capture therapy.

1. 1医療用加速器やその他に関連するサービスをお客様に提供します｜住重加速器サービス株式会社 - SHI Accelerator Service Ltd.cyclotron.co.jp
2. 2会社概要 - SHI Accelerator Service Ltd.cyclotron.co.jp
3. 3製品情報 - SHI Accelerator Service Ltd.cyclotron.co.jp
4. 4SHI Accelerator Service Ltd. - Wikidatawikidata.org