1. Graduate School of Informatics Nagoya University Chikusa‐ku, Nagoya Aichi Japan
2. Information Strategy Office, Information and Communications Nagoya University Chikusa‐ku, Nagoya Aichi Japan
3. School of Information Science Aichi Institute of Technology Yagusa‐cho, Toyota Aichi Japan
4. Research Center for Medical Bigdata National Institute of Informatics Chiyoda‐ku, Tokyo Japan