Yondenko Corp. engages in general equipment installation works. It operates through the following business segments: Facility Works, Leasing, Solar Power, and Others. The Facility Works segment covers power distribution, power transmission, civil engineering, electric and instrument works, air conditioning, plumbing, and telecommunications. The Leasing segment leases construction machinery, vehicles, and equipment. The Solar Power segment sells electricity generated by solar power. The Others segment includes computer aided design software and construction material sales, and designated management business. The company was founded on May 1, 1963 and is headquartered in Takamatsu, Japan.