Kelp
Kelps are large brown algae seaweeds that make up the order Laminariales. There are about 30 different genera.
Saccharina japonica
The species has been cultivated in China, Japan, Russia, France and Korea. It is one of the two most consumed species of kelp in China and Japan. Saccharina japonica is also used for the production of alginates, with China producing up to ten thousand tons of the product each year.