About the Authors

Hiromitsu Miyata

miyata@he.u-tokyo.ac.jp

Affiliations Japan Society for the Promotion of Science, Tokyo, Japan, Graduate School of Human Relations, Keio University, Tokyo, Japan

Shigeru Watanabe

Affiliation Faculty of Letters, Keio University, Tokyo, Japan

Yasuyo Minagawa

Affiliation Graduate School of Human Relations, Keio University, Tokyo, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HM. Performed the experiments: HM. Analyzed the data: HM. Contributed reagents/materials/analysis tools: HM SW YM. Wrote the paper: HM YM. Conceived and supervised the project: SW.