Azai Sukemasa (浅井 亮政) (1491 - January 21, 1546) was the father of Azai Hisamasa and built Odani Castle from where Azai clan would rule.
Sukemasa used to be a retainer under Kyogoku clan but he gradually increased his power under an internal struggle in the Kyogoku clan. Eventually, he managed to become daimyo but came to be engaged in a perpetual struggle against Rokkaku Sadayori. He was once completely overrun and forced to retreat into Echizen but with the help of Asakura clan, managed to maintain the independece. While this alliance would later prove to be a curse to the Azai clan, it was essential to the clan's survival at this time.
Azai Hisamasa (浅井 久政 Azai Hisamasa) (1524 - September 23, 1573) was a son of AzaiSukemasa and the second head of Azai clan.
Hisamasa became the head of Azai clan on 1542 after his father died, but unlike his father, he was never a strong leader.
Hisamasa's retainers had enough with Hisamasa and after his son Azai Nagamasa won the Battle of Norada against at least double the number of troop commanded by Rokkaku Yoshikata to win back independence, they forced Hisamasa into a retirement.