He became the adopted son-in-law to Sadayoshi TAGA, the lord of Takashima County in Omi Province; however, he was forfeited his rank and properties in 1582 because he sided with Mitsuhide AKECHI during the Incident at Honno-ji Temple, and consequently he became a vassal of his elder brother Hidemasa, and he was given 8,000 koku (1 koku=5.12 US bushels: 8000 koku=40,960 US bushels of rice crop per year for income from his territory) of feudal estate.
近江国高島郡の国人多賀貞能の婿養子となるが、1582年、本能寺の変に際し明智光秀に与したため改易となり、兄秀政の家臣となり8千石を領した。