Tōhoku region
Tōhoku was traditionally considered the granary of Japan because it supplied Sendai and the Tokyo-Yokohama market with rice and other farming commodities. Tōhoku provided 20 percent of the nation's rice crop. The climate, however, is harsher than in other parts of Honshū due to the stronger effect of the Siberian High, and permits only one crop a year on paddy fields.
Saccharina japonica
Saccharina japonica is a marine species of the Phaeophyceae (brown algae) plant , a type of kelp or seaweed, that is extensively cultivated on ropes between the seas of Japan and Korea. It is widely eaten in East Asia. A commercially important species, "S. japonica" is also called ma-konbu () in Japanese, dasima () in Korean and hǎidài () in Chinese. Large harvests are produced by rope cultivation which is a simple method of growing seaweeds by attaching them to floating ropes in the ocean.