About the Authors

Yoichi Ochiai

yoichi.ochiai@me.com

Affiliation Graduate School of Interdisciplinary Information Studies, The University of Tokyo, Tokyo, Japan

Takayuki Hoshi

Affiliation Center for Fostering Young and Innovative Researchers, Nagoya Institute of Technology, Aichi, Japan

Jun Rekimoto

Affiliations Graduate School of Interdisciplinary Information Studies, The University of Tokyo, Tokyo, Japan, Sony CSL, Tokyo, Japan

Competing Interests

One of the authors (Jun Rekimoto) is employed by commercial company: “Sony CSL 3-14-13 Higashigotanda, Shinagawa-ku Tokyo 141-0022 Japan”. However, this does not alter the authors’ adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: YO TH. Performed the experiments: YO TH. Analyzed the data: YO TH. Contributed reagents/materials/analysis tools: YO TH JR. Wrote the paper: YO TH.