1. Itani, J., 1956. Japanese monkeys in Takasakiyama, in K. Imanishi ed. “Nihon-Dobutsuki,” II. (in Japanese)
2. Itani, J. & K. Tokuda, 1954. The nomadic life of the wild Japanese monkey (Macaca fuscata fuscata) in Takasakiyama. Japanese Jour. Ecology, 4 (1). (in Japanese)
3. Itani, J., 1958. On the acquisition and propagation of a new food habit in a natural troop of Japanese monkeys in Takasakiyama. Primates II. (in Japanese)
4. -- 1956. The food habits of the Japanese monkeys in Takasakiyama. Primates Research Group III. (in Japanese)
5. Izawa, K., 1963. The dietary life of the Japanese monkeys in the Shimokita Peninsula. Monkey, No. 70. (in Japanese)