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近十年来、由于木材供需情况和木质房屋建筑的显著变化,日本曾面临不少需要解决的困难问题。木材供应和需要的变化虽然日本国士的2/3为森林所复盖,然而这些森林中的1/3以上都是人工营造的针叶树,林内是国内木材的供应量仍然低到只有全年所需木材一亿立方米的30％。其原因是80％人的工但都是幼林,要十几年以至几十年后才能供应国内市场的需要。日本的最终目的,期望将国林木材的自给率提高到大约60％。
In the past decade, Japan has faced many difficult problems to be solved due to the significant changes in timber supply and demand and the construction of wooden houses. Changes in timber supply and needs Although about two-thirds of the Japanese nationals are covered by forests, more than one-third of these forests are hand-made conifers, and the supply of domestic timber is still low in the forest, only for the whole year 30% of wood one hundred million cubic meters. The reason for this is that 80% of workers are young workers but need more than a decade or even decades to supply the domestic market. Japan’s ultimate goal is to raise the self-sufficiency rate of Guolin to about 60%.