Our Association was founded and approved by the Ministry of Labor in 1964, and its members are contractors and contractors' organizations.

62,000 contractors in are our members now. In addition, there are about 613 construction related organization, and the member of contractors in those organization in about 350,000. This means total contractors of around 412,000 are participating JCOSHA consists of a head quarter in TOKYO and 47 branch offices in all prefectures, and conducts following activities with instruction and support from be government.