- Birth: 1495?
- Death: 1546
- Distinction: Ômi warlord
- Title: Bizen no kami
- Sons: Asai Masahiro, Asai Hisamasa, and Asai Akimasa (adopted)
Sukemasa was a son of Asai Naotane and succeeded Asai Naomasa. He began his career as a retainer of the Kyôgoku and gradually increased his position to the point where he was essentially an independent lord. He made Odani castle in northern Ômi (built in 1522) his capital and allied with the Asakura of Echizen. After about 1516, Sukemasa spent much of his time competing with the Rokkaku of southern Ômi.