Igarashi Sogyo, Inc.


Founded in 1951, Igarashi Sogyo developed as an electrical contractor in the Hitachi area, installing electrical power and equipment into residences, buildings, and facilities. Now as a leading general infrastructure firm in the region, we offer a wide range of services including scaffolding, general building, plumbing, and painting in order to serve our customers seamlessly. Energy conservation projects have also been a pivotal part of our business. We have years of experience in installing solar power generation systems and have built a number of photovoltaic power stations in the region. Furthermore, we make constant efforts to ensure high-quality service for our customers, continuously meeting the ISO standards of quality management, environmental management, and information security management. We will strive to meet our customers’ varying needs with courtesy, skills, and technology and bequeath an ecological and prosperous future for next generations.


  • Electrical wiring

  • Plumbing

  • General construction

  • Civil engineering

  • Electrical communication

  • Fire protection

  • Scaffolding & earthwork

  • Water supply & drainage

  • Painting

  • Demolition work

  • Security services

  • Solar power generation

  • Industrial waste services

  • Air-conditioning

  • Information and telecommunications networks

  • Information systems architecture


Igarashi Sogyo was started by Yoshijiro Igarashi in 1951. It was a small, individually owned company, and Yoshijiro’s generous and mild disposition earned trust of local people. In 1979, his son-in-law Tatsuo Igarashi succeeded the business and converted it into a corporation. During this period, the company grew rapidly and opened business offices in Tokyo and various locations in Ibaraki Prefecture. At the same time, the company obtained licenses for plumbing, civil engineering, painting, and water & sewage work, which led the company to rename itself as Igarashi Sogyo in 2010. In the following year, Norio Igarashi, one of Tatsuo’s sons, became the president of the company. Norio, who has actively engaged in a number or regional revitalization projects, values the company’s close ties with local communities, while expanding the company’s business and adopting state-of-the art technologies. Following their predecessors, Norio and his staff members cherish the corporate spirit which is to grow by cultivating respectful manners, striving for self and corporate improvement, and contributing to society.

Contact us

  • Email: info@igarashisogyo.com

  • TEL:+81-294-85-8100

  • Address: 2-8-6 Saiwai-cho, Hitachi, Ibaraki 317-0073

Corporate Profile

Company name: Igarashi Sogyo, Inc.

President: Norio Igarashi

Established: June, 1951 (69 years since its establishment)

Head office address: 2-8-6, Saiwai-cho, Hitachi, Ibaraki, 317-0073, Japan

Head office phone: +81-294-85-8100

Revenues: 2,583,000,000 yen


Email: info@igarashisogyo.com

URL: http://www.igarashisogyo.com/

International Certification Standards:

  • ISO 9001 (2008): certified in 2001

  • ISO 14001 (2004): certified in 2009

  • ISO 27001 (2005): certified in 2011

  • OHSAS 18001 (2007): certified on 2016

  • OHSAS 18001 renamed to ISO 45001: Certified in 2018

Regional Offices

Hitachinaka Office

2230-8 Takaba, Hitachinaka, Ibaraki, 312-0062

Tel: +81-29-274-9977 Fax: +81-29-274-9988

Kitaibaraki Office

2863-2 Kamisakurai, Nakagocho, Kitaibaraki, Ibaraki, 319-1559

Tel: +81-293-42-7660 Fax: +81-293-42-7661

Tokai Office

3-11-14 Funaishikawaekinishi, Tokai, Naka District, Ibaraki, 319-1116

Tel: +81-29-306-1331 Fax: +81-29-306-1332

Moriya Office

4-9-20 Goshogaoka, Moriya, Ibaraki, 302-0119

Tel: +81-297-46-3336 Fax: +81-297-46-3666

Tokyo Office

2-1-11 Aoi, Adachi, Tokyo, 120-0012

Tel: +81-3-5845-3588 Fax: +81-3-5845-3589

Iwaki Office

103-18 Mukaiyama, Yoshimamachi Ori, Iwaki, Fukushima, 970-1147

Tel: +81-246-88-7502 Fax: +81-246-88-7503

Aomori Office

12-8 Kawaragi-sodenosawa, Hachinohe, Aomori 039-1161

Tel: +81-178-32-0850 Fax: +81-178-32-0851