On Friday, Nissui-owned Yumigahama Fisheries harvested its first volumes of land-based chub mackerel from its recirculating aquaculture system (RAS) facility in Sakai, in southern Japan.

The project is a joint venture between Yumigahama and major industrial engineering firm Hitachi Zosen, which provided the water-treatment technology for the farm, utilizing underground seawater.

The first fish harvested weighed between 250-350 grams and were sold to mass retailers and fishery wholesalers.

The fish come from lab-produced seedlings introduced to the RAS facility in June 2020.