In this study, we estimated the lengths and widths of tree crowns based on the digital surface model (DSM)/ digital elevation model (DEM) obtained from airborne light detection and ranging (LiDAR) data. Chamaecyparis obtusa stands were selected for analysis. The study site was the Tokyo University Forest in Chiba, which is managed by the University of Tokyo. First, we calculated the DSM and DEM for the University Forest in Chiba for the analysis of canopy information. We established a circular sample plot in Chamaecyparis obtusa stands and measured the crown length and width of the individual trees. We estimated the crown length and width of the individual trees using the DSM and DEM. Next, we compared crown lengths and width obtained from airborne LiDAR data with crown lengths and widths obtained from ground surveys and checked the accuracy of this methodology. This presentation will deal with the accuracy of the crown information derived from airborne LiDAR data and relationship between the average crown surface area and the stem surface area estimated from airborne LiDAR data and ground survey data.