東北地方の普通合板工業に関する考察

抄録

1) Plywood factories in Japan can be classified into two types concerning their types of distributioi. In the type 1, the factories show a concentrated distribution at ports where timber is imported, such as Tokyo, Shimizu, Nagoya and Osaka. In these factories, plywood is produced using imported timber, chiefly Lauan from tropicals, especially from Philippines. The factories belonging to the type 2 are such as are distributed all over the country. Those in Tohoku belong to this type.
2) In Tohoku, some of the factories use timber from neighbouring woodlands. So plywood factories are located in inland area in Tohoku, such as in Kitakami, Yajima, Jumonji and Kariya. They are dependent on timber of broad leaf trees, especially beech, from neighbouring woodlands. Many factories in Tohoku were established just before the end of World \Var It. These factories were founded on two main reasons: one reason is that there was aboundant timber resources in Tohoku, and the other, the national policy. But now the suitable trees for the plywood are decreasing and the factories will be obliged to use imported timber like the factories located at the timber importing ports like the factories of type 1.
3) Prom the ways to acquire timber, plywood factories in Tohoku can be classified into following three groups.
(a) All the timber is supplied from neighbouring woodlands, e. g. Yajima.
(b) At the beginning of their establishment, used timber from nearby woodlands, but in recent years, most of the timber is imported, e. g. Kitakami and Kariya.
(c) Since the establishment of plywood factories, they have been dependent upon imported timber. This type is new in Tohoku, but in future this type of factories will make the majority of the general factories in. Tohoku. Such factories are located near the ports of import such as Hachinohe, Miyako, Akita and Ishinomaki.