Technology & Solutions


50 years of experience in Southeast Asia
Contributing to the development of customers and regions

Sumitomo Densetsu is involved in providing construction services such as electrical systems, air-conditioning and plumbing systems, electrical instrumentation and plant construction in seven overseas countries: Indonesia, Thailand, Cambodia, Myanmar, the Philippines, China and Malaysia. We have provided various construction services, mainly for the overseas factories of Japanese-affiliated companies ever since we started foreign operations in the late 1960s.


Total partner for factory construction

We undertake integrated construction of factories, including electrical systems, air-conditioning and plumbing systems, and machine installation, as a total solution partner for factory construction. At the same time, we play the role of “Factory doctor” to provide a deterioration diagnosis and suggestions about energy-saving measures after the completion of construction, contributing to the smooth operation of customers’ activities.

Support energy-saving measures in factories

We also support energy-saving measures in factories, including the introduction of photovoltaic generation and cogeneration systems.

Established technical centers in Indonesia and Thailand

We have established technical centers in Indonesia and Thailand, where actions to improve the quality and construction efficiency are being taken to achieve higher customer satisfaction.

Engaged in the construction of hotels and commercial facilities

We have accumulated experience in the construction of buildings such as hotels and commercial facilities mainly in Indonesia. We will meet the needs of customers advancing into the Southeast Asian market.

List of overseas subsidiaries

Country Indonesia
Address Summitmas Ⅰ, 7th Floor, Jl.Jenderal Sudirman Kav.61-62, Jakarta Selatan, Indonesia
Contact Tel : +62-21-525-3400
Fax : +62-21-520-2105
Founded March 25, 1977
Capital USD 9,000,000
President Director Masakazu Ikejiri
Country Thailand
Address 252 SPE Tower, 15th Floor, Phaholyothin Road, Samsennai, Phayathai, Bangkok, 10400, Thailand
Contact Tel : +66-2044-7888
Fax : +66-2045-1888
Founded October 04, 1985
Capital THB 16,000,000
President Director Norifumi Kikuchi
THAI SEMCON CO.,LTD. Cambodia Branch
Country Cambodia
Address #C30, Street cheerfulness, Phum Teuk Thla, Sangkat Teuk Thla, Khan Sen Sok, Phnom Penh Cambodia
Contact Tel : +85-523-900-347
THAI SEMCON CO.,LTD. Myanmar Branch
Country Myanmar
Address B/308,Ocean Taw Win Thirl Condominium, Pyay Road, 9 Miles, Mayangone, Yangon, Myanmar
Contact Tel : +95-977-3099902
Country Thailand
Address 700/256 Moo 1 Tambon Ban Kao Phan Thong District, Chonburi province 20160 Thailand
Contact Tel : +66-3846-5060
Fax : +66-3846-5059
Founded July 09, 2018
Capital THB 10,000,000
President Director Pongsak Tangsirichai
Country Vietnam
Address HATA Building 1st Floor , 115 Pham Viet Chanh Street, Ward 19,Binh Thanh District, HCMC Vietnam.
Contact Tel : +84-28-3840-7888
Fax : +84-28-2250-8099
Founded July 02, 2019
Capital USD 3,600,000
President Director Hajime Nishida
Country Philippines
Address 8th Floor, GC Corporate Plaza, 150 Legaspi Street, Legaspi Village, Makati City, Philippines
Contact Tel : +63-2-8817-5571
Fax : +63-2-8813-4923/8813-5359
Founded December 04, 1990
Capital PHP 10,750,000
President Director Tomonori Nakagawa
Country China
Address Room311, Tianxiang Building, No.1068, Maotai Road, Changning District, Shanghai 200336, China
Contact Tel : +86-21-5206-7700
Fax : +86-21-5206-9260
Founded August 27, 2003
Capital CNY 25,264,800
President Director Norikazu Oshima
Country China
Address Room 311, Tianxiang Building, No.1068, Maotai Road, Changning District, Shanghai 200336, China
Contact Tel : +86-21-5206-7700
Fax : +86-21-5206-9260
Founded January 14, 2010
Capital CNY 500,000
President Director Hikaru Hijikata
Country Malaysia
Address Lot 2-49, JalanSU8, Taman Perindustrian Subang Utama 40300 Shah Alam, Selangor Darul Ehsan, Malaysia
Contact Tel : +60-3-5192-7711
Fax : +60-3-5192-7722
Founded November 29, 1979
Capital RM 751,000
President Director Tetsuya Ajiki

Business Overview


Provide high-quality, reliable electric transmission technologies to meet the needs of customers

Electricity is vital to modern society. Sumitomo Densetsu has a range of experience in the construction of the facilities required for the transmission of “electricity,” including overhead and underground transmission, electrical substations, and electrical power distribution systems. We are also engaged in the construction of interconnected systems to supply electricity from new energy facilities, including photovoltaic power stations, wind power stations and hydroelectric power stations.


Provide speedy and high-quality services for electrical systems that are becoming increasingly important

Electrical systems used for buildings are becoming increasingly sophisticated and diversified in pursuing convenience and comfort. The stable supply of electrical energy has become more important, especially for managing various kinds of risks, dealing with BCPs, fulfilling social responsibilities such as environmental protection, and achieving a sustainable society.
Sumitomo Densetsu has been implementing speedy and high-quality planning, design, construction and maintenance, making use of our high technological capabilities for various electrical systems (high-voltage, low-voltage, disaster preventive and security). We will meet any kind of needs based on substantial experience both inside and outside Japan.


Contribute to the use of energy for a new age, such as solar, storage cell and biomass systems

Sumitomo Densetsu contributes to the improvement of the social environment through the use of energy for a new age, taking advantage of the technologies for electrical systems we have built up over many years. We undertake a broad range of construction, including photovoltaic, redox flow battery (large-sized storage battery), and biomass power-generating systems, in order to meet the needs of customers.


Offer highly satisfactory engineering expertise in control/management systems such as FMS and BMS

Sumitomo Densetsu offers total solutions for various kinds of systems, including electrical work and electrical instrumentation at factories/plants, establishment of the facility management system (FMS), and establishment of the building energy management and automation system (BMS). We will continue offering highly satisfactory engineering expertise, with trust and technologies at its core.

Communication System

Establish a communication infrastructure, with the motto “Safety and Quality First”

Sumitomo Densetsu provides total engineering services from consultation, system design, construction and operation to the maintenance of communication/broadcasting infrastructure. With the motto “Safety and Quality First,” we will continue supporting the ICT society.

Information & Telecommunication

Support the establishment of optimal networks using accumulated know-how

As the IT society develops, information networks, which are the infrastructure of the IT society, become more and more important. Sumitomo Densetsu was the first in our industry to make efforts to establish information networks, and has introduced them in many companies, universities, hospitals, data centers, etc. We provide optimal systems ranging from design, establishment, and operation to maintenance, taking advantage of our accumulated know-how.

Plant and HVAC

Make the environment of buildings and factories more comfortable and convenient

Sumitomo Densetsu is involved in the planning, construction and maintenance of plant machines used in various kinds of manufacturing plants, and of air-conditioning and plumbing systems in factories, office buildings and hotels. We secure a sanitary and comfortable environment and improve convenience for production and management in buildings and factories used for various purposes.