抄録
In Toyama plain, there have been many big rivers such as Kurobe-river, Jyoganji-river, Jinzu-river and Shogawa-river, and these rivers gave great benefits to those who lived there whereas the rivers robed human lives as well as rice fields and wooden houses during floods. In order to mitigate flood disasters, the lord built large embankments and promoted to plant trees in mountain areas.In this paper, the policy and its effects on human lives are discussed.
Kaga province selected seven kinds of trees such as pines, cryptomerias and so on as the symbol of protection of forests. This policy was called as seven-kinds-of-trees-system. If a farmer wanted to cut the trees even if they were of his own, he had to obtain permission of the authorities concerned.
This system made a good effects on the forest protection, however, farmers lost to the intention to plant trees because they were not able to cut the trees freely.Nevertheless, this idea has been inherited to the present forest law.
