1. Kansai Research Center, Forestry and Forest Products Research Institute, 68 Nagaikyutaroh, Momoyama, Fushimi, Kyoto, 612-0855, Japan
2. Okinawa Churashima Foundation, 888 Ishikawa, Motobu, Kunigami, Okinawa, 905-0206, Japan
3. Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, 464-8601, Japan