Nobuhiro Ishikawa

Manufactures and sells caustic potash, acrylic acid, functional chemicals, polymer flocculants, photocurable resins, building materials & adhesives

TOA Engineering Corp. is a Japanese comprehensive engineering company specializing in the design, development, manufacturing, installation, and maintenance of telecommunications, audio, and video systems. The company is based in Tokyo, Japan. It serves clients such as government agencies, railway companies, airports, schools, and commercial facilities, providing solutions including emergency and disaster prevention broadcasting, station and train public address systems, conference and paging systems, CCTV surveillance, and security systems.