Mashiko Masatsuna

Mashiko Masatsuna (c. 1250–1302) was a warrior of the late Kamakura period. Born the fourth son of Utsunomiya Yoritsuna of Shimotsuke Province, he married a daughter of Mashiko Munetomo and succeeded as head of the Mashiko clan, whose holdings lay around Mashiko in Haga district.

During the Mongol invasion of 1281, the Kōan campaign, he took the field under his kinsman Utsunomiya Sadatsuna. He died in the second month of 1302.