Tokyo-based alternative asset manager J-STAR Co Ltd announced Wednesday that it has acquired Japanese aquaculture firm Dainichi Corporation for an undisclosed amount.

J-STAR, a mid-market player in the Japanese private equity market, said it has acquired the shares of Dainichi from existing shareholders, including the founder’s family.

Established in 1973, Dainichi started as a feed business in Uwajima, one of Japan’s top marine aquaculture areas.