Sō Tsuneshige

Sō Tsuneshige, also called Sōkei, was the fifth head of the Sō clan of Tsushima and a son of Morikuni. He received a character for his name from Shōni Sadatsune of northern Kyushu, to whom the Sō were vassals.

In 1349 he made his younger brother Yoritsugu his deputy on the island and moved him to Nii village. After the Shōni ceased issuing orders on Tsushima around 1362, he turned the Sō holdings there into a domain of their own. Sumishige succeeded him.