| Furthermore, most of the mountains and forests which could be profitable have disappeared because of the sharp decline in the wood price due to an increase of imported woods which abounded in foreign countries after the 1970s. |
また、1970年代以降の外国での有余った輸入材の増加に伴う木材価格の暴落により、採算に見合う山林の大部分が消滅した。 |