Yoshitoshi was the 19th head of the [[So clan|Sô clan]] and the first [[Edo period]] lord of [[Tsushima han]]. The fourth son of [[So Masamori|Sô Masamori]], he was a son-in-law of [[Konishi Yukinaga]] and succeeded to become head of the Sô house in [[1588]]. Yoshitoshi served in the [[Korean Invasions]] under Yukinaga and later sided with [[Tokugawa Ieyasu]] during the [[Sekigahara Campaign]] ([[1600]]), though he took no part in the fighting at Sekigahara. | Yoshitoshi was the 19th head of the [[So clan|Sô clan]] and the first [[Edo period]] lord of [[Tsushima han]]. The fourth son of [[So Masamori|Sô Masamori]], he was a son-in-law of [[Konishi Yukinaga]] and succeeded to become head of the Sô house in [[1588]]. Yoshitoshi served in the [[Korean Invasions]] under Yukinaga and later sided with [[Tokugawa Ieyasu]] during the [[Sekigahara Campaign]] ([[1600]]), though he took no part in the fighting at Sekigahara. |