- Death: 1536?
- Other name: Hôjô Tsunenari
- Title: Hyôgo no kami
- Japanese: 福島 正成 (Kushima Masanari)
Kushima Masanari was the lord of Takatenjin castle in the Kito district of Totomi province, and was a vassal of Hôjô Ujichika. He was defeated by Takeda Nobutora's army in 1521 but whether he died on this occasion or in a battle in June of 1536 is a matter of debate among scholars. His son was adopted by Hôjô Ujitsuna.