Kyowanissei Co Ltd is engaged in the construction business in Japan. It constructs gas facilities & apartment buildings & plant facilities It also provides maintenance, repair & installation services for sanitary equipment & air conditioning equipment. Its gasworks includes interior and underground piping work; construction and facility work include construction work, water supply, and drainage work, the air-conditioning system work and interior finishing work; electrical facility and civil engineering work include underground burial of electric cables work, engineering work, as well as water and sewerage work.