was the founder of the Shimazu samurai clan.
Tadahisa was a son of the Shà Âgun Minamoto no Yoritomo (1147âÂÂ1199) by the sister of Hiki Yoshikazu.
According to a record of his life, he was reportedly born in Sumiyoshi Taisha in Osaka. He was initially but after being given the position of jità  (land steward) of the Shimazu Estate by Minamoto no Yoritomo, he took the name of Shimazu.
He received the domain of Shioda (Shinano province) in 1186 and was then named Shugo of Satsuma province. He sent Honda Sadachika to take possession of the province in his name and accompanied Yoritomo in his expedition to Mutsu in 1189.
He went to Satsuma in 1196, subdued Hyà «ga and à Âsumi provinces, and built a castle in the domain of Shimazu (Hyà «ga) which name he also adopted. He died in 1227 and was buried in Kamakura, near his father's tomb. His descendants ran the Shimazu clan (named after him) for hundreds of years.