1. Laboratory of Forest Protection, Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan
2. Forest Management Section, Agriculture and Forestry Improvement Division, Department of Agriculture, Forestry, Commerce, and Industry, Kyoto Prefectural Nantan Regional Promotion Office, Kameoka, Kyoto 621-0851, Japan
3. Laboratory of Forest Ecology and Physiology, Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya, Japan