1. Graduate School of Engineering Osaka Institute of Technology Asahi‐ku Osaka Japan
2. Division of Forest and Biomaterials Science, Graduate School of Agriculture Kyoto University, Kitashirakawa Oiwake‐cho Sakyo‐ku Kyoto Japan
3. Planning and Development Department Technology Development Office, Toclas co., Nishi‐ku Hamamatsu Shizuoka Japan
4. Department of Mechanical Engineering Osaka Institute of Technology Asahi‐ku, Osaka Japan