Adachi Kagemori (安達 景盛) (died 1248) was a Japanese warrior. He was part of the Adachi clan, and then he joined the Hojo clan. He was the son of Adachi Morinaga, who was a close advisor to Minamoto no Yoritomo. Kagemori played a significant role as a gokenin and was a trusted advisor to Minamoto no Sanetomo
Kagemori's influence and loyalty to the Hojo clan helped solidify the Adachi clan's power in the provinces of Musashi, Kozuke, and Dewa.