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영어

This study acquired the forest GIS for private and communal forests from prefectures and national forests from the Forestry Agency of Japan. Then, this study calculated incomes and expenditures such as silvicultural and harvesting as well as stumpage prices on the Japanese cedar, cypress, pine, and larch forests using the silvicultural prescriptions set based on the regional forest plans and operation systems set based on topographic conditions such as slope angles and height differences with GIS. Finally, this study estimated the availability of unused materials for woody biomass power generation plants under operation with FIT at the end of June 2020 as the supply potential from the profitable subcompartments. As a result, supply potentials of timber and forest biomass were estimated at 65,490,336 m3/year and 13,098,067 m3/year, respectively whereas those availabilities were estimated at 31,080,672 m3/year and 6,216,134 m3/year respectively. Therefore, the rate of the availabilities to the supply potentials was 47.5%. Furthermore, the rate of the availabilities to the current demands was 71.6%. Considering aggregation in the same watershed, the rate of the availabilities to the demands increased to 124.8%. Thus, the availabilities met the current demands in Japan as a whole.