About TOA

Company Profile

TOA DENSETSU KOGYO CO., LTD. Is a company that contributes to regional development through electricity indispensable for everyone’s life.

We conduct business that supports economic base and life base with a wide range of technical capabilities from electric construction in domestic and foreign, from electric construction to telecommunication construction, solar power generation facility construction, highway maintenance.

In March 2014, we were able to celebrate the 20th anniversary. Thank you very much. Also an overseas branch “TOA DENSETSU VIETNAM CO., LTD.” was established in Vietnam in July, 2017.

We will continue to provide you with a safe and comfortable environment for everyone’s life in the future.

We appreciate your continued support.


Electric construction, telecommunication construction, highway maintenance.
Moreover, although it is only an example, construction of the following items etc. is also done.

  • Electric construction
  • Telecommunication facilities
  • Highway maintenance
  • Optic fusion wear test
  • Wireless facilities
  • Communication pipeline, communication line, CATV construction
  • Solar power generation construction
  • EV construction


We would like to contribute to society so that we can realize a better living environment for the future through electrical construction, communication facility construction, highway maintenance, solar power plant construction work.

In familiar places, I am daily pursuing to make better living environment friendly to the earth by engaging in equipment such as road information board, EPC system, LED lighting equipment and so on.


Based on our abundant achievements, based on the philosophy that contributes to society, it is very powerful in the electrical construction of the transportation and information maintenance network of the metropolitan area, telecommunications construction, highway maintenance, but all employees day and night are united I am working hard on my business.

In addition, we are also engaged in EPC (engineering, procurement,construction ), O & M (operation, management) of solar power generation, etc.

We aim to create an environmentally friendly eco-friendly future by treating harmony with nature I am doing my best.
And, as well as Japan, I expand overseas business.

In addition, as well as Chiba, I carried out the disaster prevention drill using solar power generation, battery, the Electric vehicle(EV) in cooperation with Aichi prefectural government office and Toei-city, Aichi.

We are working hard to prevent environmental pollution by cooperating in the development of the region so that the residents can live with peace of mind by raising awareness of disaster prevention.


Head Office:2-19-1, Ohori, Futtsu city, Chiba, 293-0001, JAPAN
Tel . +81-439-88-1381 Fax . +81-439-88-1382
Tokyo Branch:#304, 4-42-3 Kamata, Ota-ku, Tokyo 144-0052, JAPAN
Tel . +81-3-6715-9414 Fax . +81-3-6715-9415
Kisarazu Branch:3-1-15, Kiyomidaihigashi, Kisarazu-shi, Chiba, 292-0041, JAPAN
Tel . +81-438-97-8731 Fax . +81-438-97-8732
Kimitsu Branch:1-9-9, Miyanoshita, Kimitsu-shi, Chiba, 299-1117, JAPAN
Tel . +81-439-32-1331 Fax . +81-439-32-1332
No. 51 Nguyen Ngoc Phuong, Ward 19,
Binh Thanh District, Ho Chi Minh City, Vietnam
Tel . +84-28-2253-9983 Fax . +84-28-2253-9973
Founded March, 1994
Construction certifications
Minister of Land, Infrastructure, Transport and Tourism ; (SC-26) No.25500
Electrical works
Minister of Land, Infrastructure, Transport and Tourism; (GC-26) No.25500
Telecommunication, General Civil Engineering, Scaffolding,Earthwork
Capital 21 million yen
Main banks Chiba Bank Kisarazu Branch
Keiyo Bank Kisarazu Branch
Chiba Shinkin Bank Futtsu Branch
MUFG Bank Kisarazu Branch

Company history

March, 1994 Establishment of TOA DENSETSU KOGYO CO., LTD. in Ichihara-shi, Chiba Prefecture started the electrical work industry.
December, 2000 Get permission of general civil engineering.
February, 2001 Futtsu branch established in Futtsu-shi, Chiba Prefecture.
December, 2004 Move head office to Futtsu-shi.
August, 2005 Get permission of telecommunications construction industry.
September, 2005 Opened kisarazu branch in 3-1-15, kiyomidaihigashi, Kisarazu-shi, Chiba Prefecture.
May, 2006 Get permission of scaffolding, earthwork construction business.
February, 2009 Get permission of specific worker dispatch business.
August, 2011 Opened kimitsu branch in 2-9-9 Higashisakata, Kimitsu-shi, Chiba Prefecture.
November, 2012 Move kimitsu branch to 1-9-9, Miyanoshita Kimitsu-shi.
June, 2014 Move head office to a new company building of 2-19-1, Ohori, Futtsu-shi.
June, 2014 Tokyo branch opened on the NSTS Bldg. 4F, 4-1-13, Motoasakusa, Taito-ku, Tokyo.
September, 2014 Get permission of specific Minister of Land, Infrastructure, Transport and Tourism permission of the authorized electrical works.
July, 2017 Established overseas branch office in Vietnam.TOA DENSETSU VIETNAM CO., LTD.
September, 2017 Get permission of worker dispatch business.
April, 2018 Move tokyo branch to #304, 4-42-3, Kamata, Ota-ku.

Qualified person List

Major qualification acquirer As of April 2018

  • The 3rd Class Electric Works Specialist …1
  • First-Class Technical Radio Operator for On-The-Ground Services …2
  • Certificate of Qualification for Managing Engineer (Electric) …15
  • Type 1 Post-installed Anchor Installation Engineer …7
  • Certificate of Qualification for Managing Engineer (Telecommunications) …1
  • Type 2 Post-installed Anchor Installation Engineer …5
  • 1st-Class Electric Works Execution Manager…14
  • Fire Defense Equipment Officers Licenses Class A Group 4 …1
  • 2nd-Class Electric Works Execution Manager…2
  • Fire Defense Equipment Officers Licenses Class B Group 4 …1
  • 1st class Electric Works Specialist …15
  • Fire Defense Equipment Officers Licenses Class B Group 7 …1
  • 2nd class Electric Works Specialist …9
  • Registered Electric Construction Main technical person training class certificate …2
  • Grade 4 Maritime Radio Operator …1