1. Department of Fundamental Sciences, Faculty of Integrated Human Studies, Kyoto University, Kyoto 606-8501
2. Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501
3. Hirao Active Glass Project, ERATO, JST, Kyoto 619-0237
4. Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 606-8501