1. Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
2. Biogeochemistry Research Center (BGC), Research Institute for Marine Resources Utilization (MRU), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, Kanagawa 237-0061, Japan
3. Department of Forest Resource Chemistry, Forestry and Forest Products Research Institute, 1 Matsunosato, Tsukuba 305-8687, Japan
4. Hokuetsu Corporation, Product Development Office, 3-2-2 Nihonbashi hongoku-cho, Chuo-ku, Tokyo 103-0021, Japan