| Company name | Group | Parent | Subsidiary | Customer | Supplier | Alliance | Bank | Shareholder |
|---|---|---|---|---|---|---|---|---|
| ダイヘングループ | ||||||||
| Tōhoku Electric Power Group | ||||||||
| 東北電力グループ・ダイヘングループ | ||||||||
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| Daihen Corporation |
Established the company with a capital of 50 million yen (joint investment by Tohoku Electric Power Co., Inc. and Hitachi, Ltd.)
Started manufacturing wound core-type pole-mounted transformers
Started manufacturing distribution boards
Increased capital to 75 million yen
Obtained construction industry (electrical work) license
Developed low-loss transformers
Made all transformer models lap core type
Developed static recloser relay for distribution lines
Developed new low-loss transformers
Developed microcontroller-based digital protection relay devices
Developed equipment related to underground distribution lines
Developed 300kVA distribution transformers
Developed automatic substation recovery devices
Increased capital to 100 million yen
Developed distribution line ground fault detection device
Developed 6kV distribution (improved model) gas-insulated switchgear
Increased capital to 125 million yen
Capital increased to 150 million yen
Achieved production of 1 million transformers
Developed ultra-high voltage substation optical LAN digital control device
Capital increased to 180 million yen
Obtained ISO9001 certification (Scope: Control systems)
Obtained ISO14001 certification (Scope: Head office and factories)
Cumulative transformer sales exceeded 100 billion yen
Developed Ethernet LAN digital control device
Developed 6kV distribution solid insulation cubicle
Completed second-generation digital protective relay series
Obtained ISO9001 certification (Scope: Distribution equipment)
Distribution line automatic voltage regulator SVR, with new control method, received the 50th Ohm Technology Award
New main building completed
Achieved 1,000 digital relay faceplates for protective relays
Damaged by the Great East Japan Earthquake
Resumed production and shipment of pole-mounted transformers
Developed new distribution digital bank control protective relay
Resumed operation of coating equipment for distribution devices
ISO9001 certification voluntarily relinquished due to damage from the Great East Japan Earthquake
Developed protective relay device for grid connection of hydroelectric power plants
Achieved production of 2 million transformers
Obtained ISO 9001 certification (scope: head office and factory)
Started transformer repair business
Development of OFR type cubicles for 6kV distribution lines
Cumulative production of digital protection relay devices reached 2,000 units
Started delivery of low-voltage voltage regulators (LVR)
Completion of new assembly plant for distribution equipment
Transitioned to ISO 9001:2015 (scope: head office and factory)
Transitioned to ISO 14001:2015 (scope: head office and factory)
Started retrofit update of distribution line cubicle protection relays
Developed and started delivery of temporary transformers
Obtained certification as a health management excellent corporation
Delivered first container-type cubicle
Daigen Corporation transitioned to management framework with Tohoku Electric Power Co., Inc.
The in-house fire brigade of Tohoku Electric Manufacturing Co., Ltd. won the fire extinguisher division for the second consecutive year at the 36th Firefighting Skills Competition. Held at Moririn Kase-numa Park in Rifu Town, the competition drew 150 participants in 30 teams.
On October 31, 35 of our employees conducted a cleanup around the headquarters. The activity is held twice a year, collecting cigarette butts and beverage containers. We will continue to contribute to the local community.
On July 1, 2022, Tohoku Electric Manufacturing Co., Ltd. implemented organizational restructuring in response to the power system reform. The distribution equipment division and control system division were abolished, a new Production Headquarters was established, and the Design Department and Manufacturing Department were positioned. The functions of the New Business Research Office were also integrated into the Production Headquarters, aiming to share technology, personnel, and equipment for highly efficient production activities.
On October 30, 42 of our employees participated in a cleanup activity around the headquarters. This activity is conducted twice a year to beautify the local streetscape. The participating employees felt the importance of continuing even during the COVID-19 pandemic and expressed their desire to contribute to community environmental beautification in the future.
Tohoku Electric Manufacturing Co., Ltd. has obtained certification as a Health & Productivity Management Organization 2021 (Small and Medium Enterprise Division). The company evaluates health promotion initiatives implemented by the Japan Health Conference and states that it will continue to promote health management with safety and health as top priorities.
Continuing from the 2021 fiscal year, we obtained certification as a Health & Productivity Management Outstanding Organization 2022 (Small and Medium Enterprise Division). We will continue to prioritize safety and health and promote health management.