Yoshishige was a son of [[So Haruyasu|Sô Haruyasu]] and ruled the island of [[Tsushima]] in the Korean Straits. He clashed with the [[Matsuura clan|Matsuura]] and in [[1587]] submitted to [[Toyotomi Hideyoshi]] and initiated a failed attempt at negotiations with the Koreans, with whom he had ties through the [[So clan|Sô's]] trading endeavors. He died while these negotiations, aimed at securing passage for Hideyoshi's armies in an invasion of China, were in progress.
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Yoshishige was a son of [[So Haruyasu|Sô Haruyasu]] and ruled the island of [[Tsushima]] in the Korean Straits. He clashed with the [[Matsura clan|Matsura]] and in [[1587]] submitted to [[Toyotomi Hideyoshi]] and initiated a failed attempt at negotiations with the Koreans, with whom he had ties through the [[So clan|Sô's]] trading endeavors. He died while these negotiations, aimed at securing passage for Hideyoshi's armies in an invasion of China, were in progress.