Hidaka horse Breeders' Association is a group of breeders located in Hidaka (Hokkaido Pref.), Japan's largest horse breeding area. The Hidaka area alone covers almost 80% of the entire country's breeding number. In 2007, there were 7,200 horses bred in Japan, the Hidaka area producing 5,680.

The association has 965 members, and The Japan Bloodhorse Breeders' Association (JBBA) works as the nationwide organization for breeders. HBA is a branch office of JBBA, working closely with them to improve the status of breeders.

Working as a branch office of JBBA, HBA also creates business as a separate entity, the most important of them being the operation of the Hokkaido Sales. Collaborating with two other breeders' associations, the Hokkaido Sales is comprised of 4 sales per year, over 13 days. In terms of the number of lots and its scale, it is the largest sale in Japan. In 2007, 2,571 horses were listed, selling 929 of them for a total of over JPY 5,736,000.

Aside from sales, HBA operates the veterinary business and stallion business. For the veterinary business, HBA holds 4 clinics within the Hidaka area, examining horses in breeding, rearing, and racing, as well as caring for epizootic prevention and vaccination, and has been taking the leadership role in veterinary science in the breeding areas.

The magnitude of the stallion business has decreased, thanks to the development of the field by private sectors, but HBA still holds 2 stallions in standing. In order to stablize the breeding platform, HBA requests to and works closely with other affiliated organizations to solve issues as smoothly as possible.