Abstract
Japanese New Natural Parks Law 2002 had enabled to designate an important area in Natural Parks for congestion regulative district. In the district, application document of the law defines congestion restriction as restriction with total number and group type of visitor. Thereupon we divided influence to total number and group size, and we researched evaluation characteristics of crowdedness feeling. And we selected wooden path at Ozegahara in Nikko National Park for our research, and we did interview survey with que.stionnaire sheet to 205 visitors. The result showed how group size influences crowdedness feeling. And our survey suggest visitors feel crowdedness when distance between visitors is less than 100m, and visitors think that they don't want to visit when the distance is less than 40m.
