Sassa Ujinaga (佐々氏長)
Ujinaga SASSA was the son of Ujitsuna SASSA. He was an individual who lived during the middle of the Kamakura period.
He was the second head of the SASSA family that was based in Sassa manor, Kazusa Province. Narimasa SASSA, who was a busho (Japanese military commander) was one of his descendants.