Company History 1955~1985

Human waste collection by the first president

Human waste collection by the first president

Instructional speech in front of Omihachiman City Hall on the first business day of the year

Instructional speech in front of Omihachiman City Hall on the first business day of the year

Ceremony to celebrate the completion of the main building

Ceremony to celebrate the completion of the main building

Completed main building

Completed main building

1955 Founded.
1958 Incorporated as Hiyoshi Koseisha Limited.

Launched an environmental improvement business.

1960 Launched businesses related to environmental conservation and improvement including septic tank maintenance and management, waste disposal management, measurement and analysis of water quality and chemical substances, environmental surveys and consulting and total building management contracting.
1965 Entrusted by Japan Highway Public Corporation with water quality management for Meishin Expressway.
1968 Launched reservoir cleaning, pipe cleaning and community plant maintenance and management businesses.
1969 Launched a pharmaceutical and industrial chemical (poisonous and deleterious substances) sales business.
1976 Licensed and registered as a measurement (concentration) certification business operator.
1978 Designated by the Ministry of Health and Welfare as an authorized agency (for drinking water inspection).

Designated by the Ministry of Health and Welfare as an authorized agency (for reservoir management and air environment measurements).

1979 Licensed and registered as a measurement certification business operator (for noise and vibration level).

Designated by the Labor Standards Office as an authorized working environment measurement agency.

Acquired a license for an industrial waste disposal business.

1980 Commended by the Governor of Shiga Prefecture as an excellent business organization for the promotion of environmental conservation.
1981 Licensed and registered as a business to perform electrical work.

Licensed as a scrap metal trader.

Licensed as a secondhand dealer.

1983 Commissioned to provide testing facilities for national competence examination (for chemical analysis).

Entrusted by Otsu City Industrial Waste Disposal Public Corporation with the maintenance and management of Otsu Clean Center.

1984 Entrusted by Sewerage Division of Omihachiman City with the operation, maintenance and management of Okishima Clarification Center.

Licensed as a general construction contractor.

Designated by the Environmental Conservation Association of Shiga Prefecture as an authorized analyzing laboratory.

Entrusted by Water Supply Office of Omihachiman City with the maintenance and management of Maki Purification Plant.

1985 Registered by Shiga, Gifu and Aichi Prefectural Governments as a septic tank maintenance and inspection business.