Emperor Suinin
The date of Masumida Shrine's foundation is unknown. Shrine tradition and the "Kujiki" records give the unlikely date of 628 BC, or the third day of the third month of the 33rd year in the reign of Emperor Jimmu. Another tradition gives the date of foundation to the reign of the semi-legendary Emperor Suinin (97 BC – 30 BC). The shrine is located near the site of the provincial capital of Owari Province, established in the Nara period and features in the Yamato Takeru myth cycle. During the early Heian period, it appears in the "Engishiki" records. It has been styled as the "ichinomiya" of Owari Province since at least the end of the Heian period.