DKK-TOA Corp. engages in the manufacture and sale of analytical and various measuring instruments. It operates through the following business segments: Measurement Tools and Real Estate Leasing. The Measurement Tools segment includes the manufacture and sale of laboratory and portable instruments, water quality analyzers, ambient air pollution analyzers, oil refinery analyzers, and electronic instruments. The Real Estate Leasing segment leases company buildings. It also manufactures and sells toxic and deleterious agents and reagents, and accepts contracts for instrumentation, electrical and telecommunication works. The company was founded on September 19, 1944 and is headquartered in Tokyo, Japan.