In [[1623]], he sent a number of students from his own Gima village to China, to study sugar production techniques. After trying the techniques himself, he worked to disseminate the knowledge throughout the kingdom; sugar soon became one of Ryûkyû's chief products. | In [[1623]], he sent a number of students from his own Gima village to China, to study sugar production techniques. After trying the techniques himself, he worked to disseminate the knowledge throughout the kingdom; sugar soon became one of Ryûkyû's chief products. |