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To analyze the long-term trend of areal changes, areas of the black pine and all other species forests were investigated using GIS software on aerial photographs. The percentage of the black pine forest areas in 1988 increased by 23% compared with 1976 and that in 2009 decreased by 11% compared with 1988 in Miho no Matsubara. Those in Senbon Matsubara similarly increased by 23% and decreased by 17%, respectively. On the other hand, the areas of all other species consistently increased duringdoi:10.5638/thagis.28.13 fatcat:3bwln2fy3fdhzowqvwb6gn6iky