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Sô Sadamori was a 15th century [[So clan|Sô clan]] lord of [[Tsushima]] who succeeded to the position of ''[[shugo]]'' after the death of his father, [[So Sadashige|Sô Sadashige]], in [[1418]]/4.<ref>Kenneth Robinson, “An Island’s Place in History: Tsushima in Japan and in Choson, 1392–1592,” ''Korean Studies'' 30 (2006), p45.</ref>

Sô Sadamori was a 15th century [[So clan|Sô clan]] lord of [[Tsushima]] who succeeded to the position of ''[[shugo]]'' after the death of his father, [[So Sadashige|Sô Sadashige]], in [[1418]]/4.<ref>Kenneth Robinson, “An Island’s Place in History: Tsushima in Japan and in Choson, 1392–1592,” ''Korean Studies'' 30 (2006), p45.</ref>

In [[1436]], Sadamori received a monopoly (within Japan) on trade with Korea. In [[1449]], he presented [[Issaikyo|an important collection]] of Korean [[sutra]]s to a [[Hachiman]] shrine on the island, which was later donated by [[Ishida Mitsunari]] to [[Mt. Koya|Mt. Kôya]].<ref>Gallery labels, Tsushima Museum.<https://www.flickr.com/photos/toranosuke/52092092117/sizes/h/]</ref>

In [[1436]], Sadamori received a monopoly (within Japan) on trade with Korea. In [[1443]], he secured an arrangement with the Korean royal court under which all Japanese traveling to Korea required a (Korean) travel permit issued by the Sô house. This strengthened the position or authority of the Sô, preventing others from competing with the Sô for prominence,<ref>Robinson, 53.</ref> and represents a significant development in setting a foundation for Sô power, and the Sô-Korea relationship, for centuries afterward.

 

Sadamori, like his father, also notably received a number of sutras and Buddhist bells from Korea. In [[1449]], he presented [[Issaikyo|an important collection]] of Korean [[sutra]]s to a [[Hachiman]] shrine on the island, which was later donated by [[Ishida Mitsunari]] to [[Mt. Koya|Mt. Kôya]].<ref>Gallery labels, Tsushima Museum.[https://www.flickr.com/photos/toranosuke/52092092117/sizes/h/]</ref>

His younger brother [[So Moriyo|Sô Moriyo]] oversaw Tsutsu district at the southern end of Tsushima Island. Sadamori's son [[So Shigemoto|Sô Shigemoto]] succeeded him as head of the Sô house and ruler of Tsushima.

His younger brother [[So Moriyo|Sô Moriyo]] oversaw Tsutsu district at the southern end of Tsushima Island. Sadamori's son [[So Shigemoto|Sô Shigemoto]] succeeded him as head of the Sô house and ruler of Tsushima.

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