About Us

Development history

1946
  • Established as Otowa Electric Manufacturing Co., Ltd. in Gojozaka, Higashiyama-ku, Kyoto.
  • Started manufacturing and sales of retractable safety devices.
1947
Established as Otowa Electric Manufacturing Co.
Started manufacturing Otowa type current limiters and delivered to power distribution companies.
1950
The Chugoku Electric Power Co.
Accepted manufacturing rights for paper arresters invented by Chugoku Electric Power Company through years of research, and began manufacturing under the product name of P-valve lightning arresters. Image of P-valve lightning arrestor
1955
  • Reorganized into a joint-stock company.
  • Ltd. and moved the head office to Shibata-cho, Kita-ku, Osaka.
1961
Tokyo sales office established; delivery of low-voltage P-valve surge arresters begins Image of P-valve lightning arrester for low voltage
1971
The OTOWA Group established Hasegawa Electric Industry Co.
1972
Courtesy of an excellent tax filing corporation
1980
LGL lightning arrester for low-voltage power supply developed. Image of LGL lightning arrester for low-voltage power supply
1981
Surge shelter (lightning resistant transformer) developed.
1997
ISO9001 (JIS Z 9901:1994) certification acquired.
1998
  • OTOWA Group acquires all shares of NIP Engineering Corporation (formerly known as Japan Lightning Rod Industry Co., Ltd.)
  • OTOWA Group establishes Meneon Corporation (formerly known as Otowa Engineering Corporation).
1999
Registered as an electrical contractor(Minister’s License)
2000
  • Obtained ISO 14001 certification.
  • Established the head office in Amagasaki City.
2003
  • Started lightning photo contest.
  • Began accepting international students for internships.
2004
Development of Japan’s first zinc oxide type Class I SPD and Class II SPD Image of Japan's first zinc oxide Class I SPD
2005
  • Tokyo Headquarters established.
  • OTOWA Group established Theraon Co.
  • Established OTOWA Group Korea Otowa Electric Co.
  • Introduced Japan’s first IEC and JIS-compliant testing equipment.
2006
Selected as one of the “300 Energetic Monozukuri (Manufacturing) Small and Medium Enterprises that Support Tomorrow’s Japan” by the Ministry of Economy, Trade and Industry and the Small and Medium Enterprise Agency.
2008
Established Lightning Technology Center in Amagasaki City. Image of lightning technology center in Amagasaki City
2009
Established the North Daito General Exposure Testing Center in Okinawa Prefecture.
2012
Established OTOWA Group Geological & Environmental Tech Co.
2014
Selected as “Next Global Niche” by the Ministry of Economy, Trade and Industry in the 100 Top Global Niche Companies
2015
Began accepting international student internships for the ABE Initiative (Industrial Human Resource Development Initiative for African Youth).
2016
  • Celebrating the 70th anniversary of our founding
  • Implemented countermeasures against lightning damage at a high technology school in the Republic of Rwanda, Africa.
  • Selected as “Hyogo Only One Company” by Hyogo Prefecture.
2017
  • The number of visitors to the lightning technology center reached 30,000.
  • JICA Small and Medium Enterprises and SDGs Business Support Project: Implementation of human lightning damage countermeasures in the Republic of Rwanda, Africa (2017-2018)
2018
  • Head Office moved to Lightning Technology Center
  • Kyushu Plant celebrates its 30th anniversary.
  • Selected as a “Regional Future Driving Company” by the Ministry of Economy, Trade and Industry.
2019
  • Kobe Plant celebrates its 30th anniversary.
  • Recognized as an excellent health management corporation by the Ministry of Economy, Trade and Industry
  • Commissioned by the Ministry of Foreign Affairs as a special envoy for TICAD public-private partnership promotion
  • JICA Small and Medium Enterprises Overseas Development Support Project – Dissemination and Demonstration Project – Start of lightning damage countermeasures in the Republic of Rwanda, Africa (2019-)
2020
    Recognized as an excellent health management corporation by the Ministry of Economy, Trade and Industry
2021
    Recognized as an excellent corporation for health management by the Ministry of Economy, Trade and Industry