Yondenko Corporation engages in the electrical, and electrical power transmission and distribution facilities, construction activities in Japan. It operates through three segments: Equipment Installation Business, Leasing Business, and Solar Power Business. The Equipment Installation Business segment undertakes contracted power distribution work, power transmission and civil engineering work, electrical and instrumentation work, air conditioning and plumbing work, and information and communications work. The Leasing Business segment leases out construction machinery, vehicles, and equipment. The Solar Power Business segment sells electricity generated by solar power. In addition, it is involved in the development and sale of CAD software; and pole advertising activities. The company was formerly known as Shikoku Electric Construction Corporation and changed its name to Yondenko Corporation in November 1989. Yondenko Corporation was incorporated in 1948 and is headquartered in Takamatsu, Japan.