About the Authors

Eiichiro Watamura

Roles Conceptualization, Funding acquisition, Methodology, Supervision, Writing – original draft

watamura@hus.osaka-u.ac.jp

Affiliation Graduate School of Human Sciences, Osaka University, Suita, Osaka, Japan

Yichen Liu

Roles Writing – review & editing

Affiliation Graduate School of Human Sciences, Osaka University, Suita, Osaka, Japan

Tomohiro Ioku

Roles Formal analysis, Methodology

Affiliation Center for International Education and Exchange, Osaka University, Suita, Osaka, Japan

Competing Interests

The authors have declared that no competing interests exist.