Sojiro Shimada was the master of the Shimada Clan as well as the father of Hanzo and Genji. He trained Hanzo to be his successor, and allowed Genji to live a carefree lifestyle despite the elders' wishes. He gave Genji his diminutive childhood nickname "Sparrow".
Sojiro died unexpectedly years ago. Following his death, Hanzo took his place as the leader of the Shimada Clan, his short-lived stint ending after killing his younger brother and subsequently deserting the clan. Afterwards, his clan was dismantled by Overwatch with the help of Genji.