Ключевые слова: agriculture and forestry, animal, annual rings, architecture, building materials, cedar, collection, deforestation, disaster, drying, etc, flood, forest, forest management, forestry, forestry association, global environment, grain, habitat destruction, hayashi, industry, infection, japanese cedar, log, logging, mountain, mud flow, nature, primary industry, rainwater, renewable energy, resource, soil degradation, storage, thinning, timber, timber production, tree, trees, water retention capacity, water shortage, wood, wood supply, wooden house,