Wood Flow Chart for Japan: Material and Energy Utilization
Takaaki FURUBAYASHI, Yuta SUMITOMO, Toshihiko NAKATA
This study aims to make a quantitative wood flow chart in Japan. The wood flow chart includes basic information for designing the wood utilization system. The wood demand and the wasted wood amount in each industry are estimated based on the supplied wood amount. It is obtained that the estimated production amounts are similar to statistical data. According to the drawn wood flow chart in 2014, it is found that the main resources of the wood energy are the residues from the wood industry and the construction waste, and the share of the round wood in the energy use is less than 10%. 8.1 million m3 wood residues such as sawdust are generated, and 95% is utilized to the chip, self-consumption, and other wood material products. Therefore, it is required to utilize the round wood to energy use for increasing the wood self-sufficiency. According to the drawn wood flow chart in 2025 that expects higher wood self-sufficiency, it is obtained that the imported round wood amount is zero, the generated residue amount is increased because of increasing the wood production amount. It is required to increasing the domestic wood supply amount for the pulp industry for increasing the wood self-sufficiency because 16 million m3 chip for pulp is still imported.
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