From Wikipedia Article:
In 1750, Sakukawa (or Sakugawa) began his training as a student of a Ryūkyūan monk, Peichin Takahara. After six years of training, Takahara suggested that Sakugawa train under Kusanku, a Chinese master in Ch’uan Fa. Sakugawa spent six years training with Kusanku, and began to spread what he learned to Ryūkyū in 1762. He became such an expert that people gave him, as a nickname: “Tōde” Sakugawa (Sakugawa “Chinese Hand”). His most famous student, Matsumura Sōkon, went on to develop the Shuri-te which later develop into Shōrin-ryū style of karate.