Abstract
Recently, Yamamori who is the forest manager in Yoshino forestry has been declined functionally, but they continue still contributing to keep management state of forest. We classified Yamamori into 3 types: Extended type, Conventional type, Declining type. Because of the management practice which didn't restricted by the conventional custom in Yoshino forestry, only Extended type is able to get sustainability in forest management. In future, it is necessary to reconsider the conventional custom, and prepare the system to support Extended type.
