Abstract
A proliferation of bamboo which has not been managed is recognized as an environmental and ecological problem. When considering regeneration and maintenance of a forest, it is important to clarify geo-environmental characteristic of the spreading bamboo groves. This paper reports a combination of contiguous bamboo groves and an intrusion of bamboo into other vegetation, based on distribution map of bamboo groves in Yamaguchi prefecture. According to analysis of aerial photograph and field survey, a front of bamboo grove is spreading in the range of 0.7 to 2.5 m/year.