has revoked the license of a trainer for being illegally involved in the sale of horses, JRA officials said Wednesday.

Kotaro Tanaka, 62, has allegedly sold U.S.-born thoroughbreds as their breeder to owners registered with the JRA, which prohibits trainers from acting as thoroughbred breeders.

The JRA's investigations found that Tanaka falsified the certificates for the horses he sold and also pocketed margins by manipulating data on successful bidders at overseas auctions.

Tanaka obtained a trainer license in 1977 and opened his racing stable the following year. He has eight wins in graded races.