The Formosan squirrel (Callosciurus erythraeus thaiwanensis), is an arboreal mammal that originated in Taiwan. This species was first naturalized in Japan after it escaped from the zoological garden on Izu-Oshima Island, Tokyo, in the 1930s. After that, it spread throughout Izu-Oshima Island, and was then transported and became established among several sites such as urban forests, parks and Islands along the Pacific Coast in the western Kanto Region. Alien species damage native species and ecosystems on a global scale. In Japan, Formosan squirrels damage to trees and agricultural for eating, and nest in private house. we need inhibit from spreading distribution of this squirrels. Therefore, we predict future distribution map of the squirrel in Kanagawa Prefecture.