丹沢山地
Aikawa is located in the foothills of northern Kanagawa Prefecture. The Nakatsu River, a tributary of the Sagami River, flows through. A portion of the Tanzawa Mountains can be found in the western part of the town. Miyagase Dam, a major source of hydroelectric power, is situated on the Nakatsu River. The highest mountain in Aikawa is Mount Takatori.