About Us

List of bases

Headquarters

Head Office

ISO9001:2015 certifiedISO14001:2015 certified

  • 5-6-20 Shioe, Amagasaki-city, Hyogo, 661-0976, Japan
  • Tel. +81-6-6429-3541
  • Fax. +81-6-6426-0535

Sales Offices

International Sales Department (Headquarters Office)

ISO9001:2015 certifiedISO14001:2015 certified

  • 5-6-20 Shioe, Amagasaki-city, Hyogo, 661-0976 Japan
  • Tel. +81-6-6429-5951
  • Fax. +81-6-6429-0206

Tokyo Office

ISO9001:2015 certifiedISO14001:2015 certified

  • Seavans Bldg(N).20F,1-2-1 Shibaura,Minato-Ku,Tokyo, 105-8449,Japan
  • Tel. +81-3-6722-0108
  • Fax. +81-3-6722-0107

Sendai Office

ISO9001:2015 certifiedISO14001:2015 certified

  • Oak Sendai bldg. 7F, 2-5-1 Honcho, Aoba-ku, Sendai-city, Miyagi, 980-0014 Japan
  • Tel. +81-22-713-6391
  • Fax. +81-22-713-6392

Hokuriku Office

ISO9001:2015 certifiedISO14001:2015 certified

  • Urban Place 8F, 18-7 Ushijima-cho, Toyama-city, Toyama, 930-0858 Japan
  • Tel. +81-76-432-0503
  • Fax. +81-76-411-7505

Hiroshima Office

  • 9-6-27 Nishihara, Asaminami-ku, Hiroshima-city, Hiroshima, 731-0113 Japan
  • Tel. +81-82-832-4121
  • Fax. +81-82-832-4122

Kyushu Office

ISO9001:2015 certifiedISO14001:2015 certified

  • 17-30 Hie-machi, Hakata-ku, Fukuoka-city, Fukuoka, 812-0014 Japan
  • Tel. +81-92-476-5671
  • Fax. +81-92-476-5670

Okinawa Office

  • 402 Ichiryu Bldg., 3-8-9 Kanagusuku, Naha-city, Okinawa, 901-0155 Japan
  • Tel. +81-98-891-9711
  • Fax. +81-98-891-9712

R&D

Lightning Technology Center

ISO9001:2015 certifiedISO14001:2015 certified

  • 5-6-20 Shioe, Amagasaki-city, Hyogo, 661-0976 Japan
  • Tel. +81-6-6429-3541
  • Fax. +81-6-6426-0535

Device Center

ISO9001:2015 certifiedISO14001:2015 certified

  • 501-7 Miyanomae, Fukushima, Sanda-city, Hyogo, 669-1313 Japan
  • Tel. +81-79-562-5661
  • Fax. +81-79-563-7853

Kitadaito EXPOSURE TESTING FIELD

  • 24-1 Kitadaito-sonkou, Shimajiri-gun, Okinawa, 901-3900 Japan

This facility conducts long-term exposure tests of outdoor facilities, mainly for electric power and communications in a harsh natural environment for the purpose of developing superior products in Kitadaito Village, which is said to have the most severe weather conditions in the Okinawa Prefecture. As a result, it is a comprehensive exposure test site where durability evaluation and performance verification against things such as salt damage, wind, rain and ultraviolet rays can be conducted.

Manufacturing base

Kobe Works

ISO9001:2015 certifiedISO14001:2015 certified

  • 14-3 Technopark, Sanda-city, Hyogo, 669-1339 Japan

Kyushu Works

ISO9001:2015 certifiedISO14001:2015 certified

  • 523-19 Hiyoshi, Hirokawa-cho, Yame-Gun, Fukuoka, 834-0111 Japan

Hirosaki Works

ISO9001:2015 certifiedISO14001:2015 certified

  • 1-4-1 Iwaka, Hirosaki-city, Aomori, 036-8073 Japan

OTOWA websites use cookies to deliver and improve the website experience. See our cookie policy for further details on how we use cookies and how to change your cookie settings.