JR West Japan Electric System Co., Ltd.

Established Naniwa Electric System Co., Ltd.

Date of establishment: June 26, 1981 (Showa 56).

Renamed to 'Nishinippon Electric System Co., Ltd.', becoming a JR West Japan group company: established Wakayama, Fukuchiyama, Okayama, and Hiroshima branches.

Established Kanazawa and Yonago branches.

Established Fukuoka branch.

Electrical contracting business: Notification to the Minister of Commerce and Industry (No. 0211) June 26, 1990.

Established Osaka branch.

Established Nestec Co., Ltd.

Opened 'Nishinippon Electric System Technical Academy (NESCO TECHNO SCHOOL)', a second-class electrical contractor training facility designated by the Minister of International Trade and Industry (now Ministry of Economy, Trade and Industry).

Divided Osaka branch into Osaka Power Branch and Osaka Signal Communication Branch.

Made Tetsuden Co., Ltd. (formerly Tetsuden Inc.) a subsidiary.

Established Tokyo branch.

Obtained ISO 9001 certification at the Sales Headquarters.

ISO 9001: Equipment Construction Branch obtained certification (JMAQA-214) December 21, 1998.

Established Hiroshima and Fukuoka branches.

Obtained ISO 9001 certification at Tokyo, Hiroshima, and Fukuoka branches.

Changed corporate emblem.

Built a new Osaka District Office at 1-7-1 Minami-Settsu, Suita City, Osaka Prefecture, and relocated Osaka Power Branch and Osaka Signal Communication Branch.

Divided Sales Headquarters into Sales Promotion Headquarters and four branches (Central, Tokyo, Hiroshima, Fukuoka).

Constructed a new NESCO Comprehensive Building at 1-5-25 Minami-Budai, Suita City, Osaka Prefecture, and relocated the headquarters and Technical Academy. The West Japan Electric System Technical Academy received accreditation as a vocational training school.

Established the Osaka Electrical Construction Branch.

Relocated the headquarters to Shin-Osaka: Moved the Osaka Power Branch and Osaka Signal Communication Branch to the NESCO Comprehensive Building.

Osaka Electrical Construction Branch obtained ISO 14001 certification in the Osaka area.

Established NESCO Signal Construction Co., Ltd.

Tsutenden Co., Ltd. and NESTEC Co., Ltd. merged to become Tsutenden Co., Ltd.

Renamed the Hiroshima Branch to China Branch: Established Okayama Sales Office, Yonago Sales Office, and Yamaguchi Sales Office.

Established NESCO Railway Line Construction Co., Ltd.

Established a Shinkansen Headquarters under the Railway Technology Headquarters: Closed the Fukuoka Branch and established the Shinkansen General Branch; merged the Osaka Power Branch and Osaka Signal Communication Branch to establish the Osaka General Branch.

Unified the name to 'NESCO'.

Closed the Osaka Electrical Construction Branch and Osaka General Branch, and established the Power Branch and Signal Communication Branch.

Renamed the Shinkansen General Branch to Fukuoka Branch.

Established an Audit Office at the headquarters.

Certification revoked.

Renamed the Fukuoka Branch to Kyushu Branch.

At the headquarters, abolished the Railway Technology Headquarters and Sales Promotion Headquarters, and established them under the Construction Headquarters; established the Design Technology Department at the headquarters; abolished the Power Branch and Signal Communication Branch, and established the Keihanshin Branch; abolished the China Branch and distributed integration into Okayama Branch and Hiroshima Branch; merged and abolished the Fukuoka Branch and Kyushu Branch, and established the Kyushu Branch.

Fully acquired West Japan Passenger Railway Co., Ltd. as a subsidiary.

Relocated the headquarters to Minami-Budai, Suita City; abolished the Central Branch and Keihanshin Branch, and established the Railway Construction Department and Electrical Equipment Department under the Construction Headquarters.

Transferred Fukuchiyama Branch, Wakayama Branch, and Yonago Branch to West Japan Electric Tech Co., Ltd.

Acquired Takakura Industrial Co., Ltd. as a subsidiary.

Name changed to NESCO Substation Systems Co., Ltd.

Construction business: Special construction business—Permission from the Minister of Land, Infrastructure, Transport and Tourism (Special-4) No. 13400, October 27, 2022: Electrical contracting, telecommunications contracting, and fire facility contracting. General construction business—Permission from the Minister of Land, Infrastructure, Transport and Tourism (General-4) No. 13400, October 27, 2022: Pipe construction, steel structure construction, and painting.

Name changed to JR West Electric Systems Co., Ltd. (October): Abolished Electrical Equipment Department and established Equipment Construction Department.

Construction Headquarters abolished; established three headquarters—Management Strategy, Railway Construction, and Equipment Construction. Equipment Construction Department abolished and Equipment Construction Branch established. New Information and Communication Construction Department created.

Railway Construction Department abolished; Keihan-Shin Branch established. Information and Communication Construction Headquarters created (converted to headquarters).