About the Authors

Kenshiro Ichimura

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Software, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

itimura-k@niad.ac.jp

Affiliation Research Department, National Institution for Academic Degrees and Quality Enhancement of Higher Education, Kodaira-shi, Tokyo, Japan

Competing Interests

The author has declared that no competing interests exist.