About the Authors

Shinichi Furuya

Contributed equally to this work with: Shinichi Furuya, Reiko Ishimaru

Roles Conceptualization, Data curation, Methodology, Project administration, Supervision, Validation, Writing – original draft, Writing – review & editing

furuya@csl.sony.co.jp

Affiliations Sony Computer Science Laboratories Inc. (Sony CSL), Tokyo, Japan, Sophia University, Tokyo, Japan

Reiko Ishimaru

Contributed equally to this work with: Shinichi Furuya, Reiko Ishimaru

Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Writing – review & editing

Affiliation School of Science and Technology, Kwansei Gakuin University, Sanda, Japan

Noriko Nagata

Roles Conceptualization, Project administration, Validation, Writing – review & editing

Affiliation School of Science and Technology, Kwansei Gakuin University, Sanda, Japan

Competing Interests

RI and NN have no conflicts of financial and/or non-financial interest to declare. Sony Computer Science Laboratories Inc. provided support in the form of salaries for an author (SF), but did not have any additional role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript. This commercial affiliation does not alter our adherence to all PLOS ONE policies on sharing data and materials.