Nihon ISK Company, Limited
Japanese manufacturer of fire-resistant safes, dental equipment and steel office furniture, listed on the Tokyo Stock Exchange under the Hirosawa Group.
Last updated September 29, 2026
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Overview
Nihon ISK Company, Limited (日本アイ・エス・ケイ株式会社) is a Japanese manufacturer headquartered in Tsukuba, Ibaraki Prefecture, and a member of the Hirosawa Group. The company traces its origins to 1916, when first-generation president Itsuro Sano founded the sole proprietorship Nisshinsha in Taito, Tokyo, making and selling portable safes, pumps and fire extinguishers. In 1948 the business was incorporated as King Industrial Co., Ltd. (キング工業株式会社) with capital of 2.4 million yen, and a factory was established in Arakawa, Tokyo, for portable safes, cash registers and steel furniture. The company was renamed Nihon ISK Company, Limited in November 2006. Today Nihon ISK operates as a diversified, development-oriented manufacturer whose divisions cross over several industries: security equipment (anti-theft and fire-resistant safes), dental medical equipment (dental treatment units), and steel office furniture (archives and lockers). Its products reach customers from everyday households to medical and office settings. The company describes itself as an "in-house cross-industry exchange development manufacturer," reflecting its history of several independent manufacturers being reorganized under the Hirosawa Group based in Tsukuba, Ibaraki. Nihon ISK is listed on the Tokyo Stock Exchange Standard Market under stock code 7986. Its capital is 1,090.8 million yen and it employs approximately 300 people. The company is led by Chairman Kiyoshi Hirosawa and President Eiji Sone. It maintains a nationwide network of branches and sales offices — including Sapporo, Morioka, Sendai, Kitakanto, Gunma, Kanazawa, Nagoya, Osaka, Hiroshima, Takamatsu, Fukuoka and Kagoshima — and production sites at Tsukuba, Kawashima, Nakanojo and Sapporo. Its fiscal year ends in December, and it publishes annual reports, quarterly earnings releases and shareholder meeting notices. Nihon ISK's business activities are organized around three core segments: manufacture and sale of commercial and household fire-resistant safes; manufacture and sale of dental medical equipment; and manufacture and sale of steel furniture. The company positions new product development as the foundation of its business, with development, sales, manufacturing and administrative departments working together to respond quickly to user needs.
History
Nihon ISK Company, Limited traces its roots to August 1916 (Taisho 5), when first-generation president Itsuro Sano founded the sole proprietorship Nisshinsha in Taito, Tokyo, and began manufacturing and selling portable safes, pumps and fire extinguishers. In April 1948 (Showa 23), the business was incorporated as King Industrial Co., Ltd. (キング工業株式会社) in Taito, Tokyo, with capital of 2.4 million yen, and a factory was established in Arakawa, Tokyo, for the manufacture and sale of portable safes, cash registers and steel furniture. Over the following decades the company expanded its production footprint. In December 1967 (Showa 42) it opened the Sapporo Factory in Hiraoka, Sapporo, for steel furniture production. In December 1974 (Showa 49) it was registered with the Japan Securities Dealers Association as a public company. In April 1984 (Showa 59) it established a specialized factory in Nakanojo, Gunma Prefecture, for fire-resistant safe production. In August 1993 (Heisei 5) it opened the Tokyo Factory for cash register production, and in December 1993 it established the Kawashima Factory in Shimodate, Ibaraki Prefecture, beginning manufacture of safety equipment. In September 1999 it moved cash register production from the Tokyo Factory to the Tsukuba Factory, and at the Kawashima Factory it began manufacturing archives and lockers. In January 2001 it was listed on the JASDAQ Securities Exchange. In December 2004 it established the Maebashi Factory and began manufacturing storage sheds. In January 2006 it began manufacturing dental treatment units at the Tsukuba Factory. In November 2006 it relocated storage shed production from the Maebashi Factory to the Kawashima Factory and changed its corporate name to Nihon ISK Company, Limited. In April 2014 (Heisei 26) the company moved to the Tokyo Stock Exchange Standard Market (following the market reorganization), where it trades under stock code 7986. The company is part of the Hirosawa Group, based in Tsukuba, Ibaraki Prefecture. Its history reflects the consolidation of several independent manufacturers under the Hirosawa Group umbrella, which is why the company describes itself as an "in-house cross-industry exchange development manufacturer." Today it operates three core business segments — fire-resistant safes, dental medical equipment, and steel furniture — and maintains a nationwide sales and production network.
- 2014
Moved to the Tokyo Stock Exchange Standard Market (stock code 7986).
- 2006
Began manufacturing dental treatment units at the Tsukuba Factory; relocated storage shed production to the Kawashima Factory and changed the corporate name to Nihon ISK Company, Limited.
- 2004
Established the Maebashi Factory and began manufacturing storage sheds.
- 2001
Listed on the JASDAQ Securities Exchange.
- 1999
Moved cash register production from the Tokyo Factory to the Tsukuba Factory; began manufacturing archives and lockers at the Kawashima Factory.
- 1993
Opened the Tokyo Factory for cash register production and established the Kawashima Factory in Shimodate, Ibaraki Prefecture, for safety equipment.
- 1984
Established a specialized factory in Nakanojo, Gunma Prefecture, for fire-resistant safe production.
- 1974
Registered with the Japan Securities Dealers Association as a public company.
- 1967
Opened the Sapporo Factory in Hiraoka, Sapporo, for steel furniture production.
- 1948
Incorporated as King Industrial Co., Ltd. in Taito, Tokyo, with capital of 2.4 million yen; factory established in Arakawa, Tokyo.
Products and positioning
A development-oriented manufacturer crossing security equipment, dental medical equipment and steel office furniture, offering integrated development, manufacturing, sales and maintenance under its own brands.
Anti-theft safes
Security safes for business and home use.
Fire-resistant safes
Fire-resistant safes for business and home use.
Dental treatment units
Dental medical equipment manufactured at the Tsukuba Factory.
Steel archives
Steel storage archives for offices.
Lockers
Steel lockers for offices and facilities.
Sources5 sources
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