Saitō Toshikazu (齋藤俊一) (died 1582), also known as Saitō Toshizo (斎藤歳三), was lord of Ikuchiyama in Tanba Province as well as a member of the Saitō clan. Toshikazu was Saito Tatsuoki cousin, head of Saitō clan.

In 1567, after the Battle of Inabayama, Toshikazu became a vassal of Akechi Mitsuhide, who was a retainer of the Oda clan.

In 1582, at the Battle of Yamazaki, the battle between Oda Nobunaga's two de facto successors, Akechi Mitsuhide and Toyotomi Hideyoshi. Toshikazu became a commander of Akechi clan forces. During the battle, he tried to flank Hideyoshi's lines but was defeated and executed by Horio Mosuke.^[1]

• Saitō Toshimitsu