[pp.105-114]
Yuji OHBA and Koji MATSUSHITA (Kyoto University)
Abstract:
Recently, non-clear-cutting forestry methods, including selection cutting, have become increasing important. In the Imasu area of Sekigahara in Gifu Prefecture, Japan, forests of Cryptomeria japonica and Chamaecyparis obtusa are managed by selection cutting and the area’s many small-scale forest owners have long produced high-quality logs. This study examined the current situation of selection-cutting forest management in Imasu. A survey of sawmill company owners was conducted in 2010, providing data regarding log consumption and lumber production in sawmills that use logs from selection-cutting forests. The results show that the percentage of logs produced in Imasu for distribution in the local area has decreased significantly; however, the wood distribution system in the area has remained largely unchanged since 1975. The current characteristics of sawmill management can be summarized as follows: (1) In 1975, sawmills in Imasu used logs that were mainly purchased from local small-scale forest owners, but more recently most logs have been purchased at local log auction markets. (2) In 1975, most of the wood-frame housing built by the sawmill companies used a significant amount of lumber produced from logs cut in Imasu; recently, however, lumber produced from logs purchased at local log auction markets are often used. (3) Sawmills ship lumber to a small number of house builders and carpenters in neighboring areas. The percentage of lumber produced from Imasu logs has decreased.
Key Word:
Imasu, non-clear-cutting, selection cutting, high quality log, sawmill, wooden house