Date Masayori

Date Masayori (1227–1301) was a mid-Kamakura gokenin and the fourth head of the Date clan, lord of Yanagawa castle in Mutsu; after taking Buddhist vows he was known as Gansai. A second son of Date Yoshihiro, he kept the clan residence in Kamakura and fathered his successor Munetsuna.

A devout Buddhist, he imitated the Five Mountains of Kyoto and Kamakura by founding five monasteries around Date, among them Tōshō-ji in 1283, which became the Date family's first ancestral temple.