The Tama Forest Science Garden(多摩森林科学園,Tama Shinrin Kagakuen?, 57 hectares), formerly the Asakawa Experiment Forest and sometimes also known as the Tama Botanical Park, is an arboretum located at the foot of Mount Takao, 1833-81 Todori, Hachiōji, Tokyo, Japan. It is open daily except Mondays; an admission fee is charged.
The site was previously a battlefield where Hojo Ujiteru fought Takeda Shingen, then placed under custody of the Tokugawa shogunate. In 1921 it became an experimental station under the custody of the Forestry Management Division of the Ministry of Imperial Household. Today it is a branch laboratory of the Forestry and Forest Products Research Institute.
Toyoda Takeshi and Tanimoto Takeo, "Forest Succession in the Tama Forest Science Garden (the Asakawa Experiment Forest), Hachioji, Central Japan", Bulletin of the Forestry and Forest Products Research Institute, no. 377, 2000, pages 1-60. ISSN 0916-4405.