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Hrein Energy Inc.

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Japanese Hokkaido-based manufacturer of organic hydride hydrogen storage and supply systems.

Last updated September 28, 2026

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Overview

Hrein Energy Inc. (株式会社フレイン・エナジー) is a Japanese company headquartered in Chūō-ku, Sapporo, Hokkaido, with a research laboratory in Otaru, Hokkaido. It develops, manufactures and sells systems that store and supply hydrogen using organic hydrides, allowing hydrogen — a clean energy carrier — to be handled as a liquid at ambient temperature and pressure. The company's stated mission is to help realize a hydrogen energy society and to support decarbonization by making renewable energy and hydrogen easier and safer to use. The company traces its origins to April 2001, when it was established as H2 Japan Co., Ltd. (エイチ・ツー・ジャパン株式会社). In October 2004 it merged with Hydrogenetech Co., Ltd. (ハイドロジェネテック株式会社) and changed its name to Hrein Energy Inc. Its business scope covers the manufacture and sale of hydrogen production and storage equipment, maintenance and repair of that equipment, commissioned research and development related to hydrogen production/storage technology and fuel cells, and the manufacture and sale of distributed power sources and waste-treatment equipment. Hrein Energy's product line centers on two core systems: a high-density hydrogen storage unit that stores hydrogen compactly as an organic hydride, and a hydrogen supply unit that extracts hydrogen from the organic hydride on-site and delivers it. The company markets these under its "Hrein Technology" concept, positioning organic hydride technology as a way to make hydrogen handling safe and easy. Its registered capital was reported as 71.75 million yen as of April 2024, and its main investors include HVCG No. 1 Investment Limited Partnership, Sapporo Genki Technology Investment Limited Partnership, Densei Co., Ltd., Dosanko No. 1 and No. 2 Investment Limited Partnerships, and North Pacific Bank. Its principal banks are Hokkaido Bank, North Pacific Bank and Mizuho Bank. The representative director is Akira Koikeda (小池田 章).

History

Hrein Energy Inc. was established in April 2001 under the name H2 Japan Co., Ltd. (エイチ・ツー・ジャパン株式会社). In October 2004, it merged with Hydrogenetech Co., Ltd. (ハイドロジェネテック株式会社) and adopted the current corporate name, Hrein Energy Inc. (株式会社フレイン・エナジー). The company is based in Sapporo, Hokkaido, with its head office in Chūō-ku and a research laboratory in Otaru, Hokkaido. From its early years the company focused on hydrogen energy technologies, particularly the use of organic hydrides to store and supply hydrogen. Organic hydride technology allows hydrogen to be stored and transported as a liquid at ambient temperature and pressure, which the company presents as a safer and easier alternative to conventional high-pressure or cryogenic hydrogen handling. This technology underpins the company's two flagship systems: a high-density hydrogen storage unit and an on-site hydrogen supply unit. Over the years Hrein Energy has expanded its business scope beyond storage and supply equipment to include commissioned research and development on hydrogen production/storage technology and fuel cells, distributed power sources, and waste treatment equipment. It has also participated in public events and projects related to the hydrogen society, such as the Tokyo Bay eSG Project and SMART ENERGY WEEK Kansai 2024. As of April 2024, the company reported capital of 71.75 million yen. Its representative director is Akira Koikeda.

  • Established as H2 Japan Co., Ltd. (エイチ・ツー・ジャパン株式会社)

  • Merged with Hydrogenetech Co., Ltd. and renamed Hrein Energy Inc. (株式会社フレイン・エナジー)

  • Privacy protection policy declared

  • Reported capital of 71.75 million yen

  • Exhibited at SMART ENERGY WEEK Kansai 2024

Products and positioning

Developer and manufacturer of organic hydride-based hydrogen storage and supply systems that enable safe, easy handling of hydrogen as a liquid at ambient temperature and pressure, supporting a decarbonized hydrogen society.

  • High-density hydrogen storage unit

    A system that stores hydrogen compactly as an organic hydride.

  • Hydrogen supply unit

    An on-site system that extracts hydrogen from organic hydride and supplies it.

Sources5 sources

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