1. Department of Physical Therapy, Faculty of Health Science, Kio University, Nara 635-0832, Japan
2. Neurorehabilitation Research Center, Kio University, Nara 635-0832, Japan
3. Department of Neurorehabilitation, Graduate School of Health Sciences, Kio University, Nara 635-0832, Japan
4. Research Into Artifacts, Center for Engineering, Department of Precision Engineering, The University of Tokyo, Tokyo 113-8656, Japan