About the Authors

Akihiro Funamizu

Affiliations JSPS Research fellow, Chiyoda-ku, Tokyo, Japan, Neural Computation Unit, Okinawa Institute of Science and Technology, Kunigami, Okinawa, Japan, Graduate School of Information Science and Technology, The University of Tokyo, Bunkyo-ku, Tokyo, Japan

Ryohei Kanzaki

Affiliations Graduate School of Information Science and Technology, The University of Tokyo, Bunkyo-ku, Tokyo, Japan, Research Center for Advanced Science and Technology, The University of Tokyo, Meguro-ku, Tokyo, Japan

Hirokazu Takahashi

takahashi@i.u-tokyo.ac.jp

Affiliations Graduate School of Information Science and Technology, The University of Tokyo, Bunkyo-ku, Tokyo, Japan, Research Center for Advanced Science and Technology, The University of Tokyo, Meguro-ku, Tokyo, Japan, PRESTO, JST, Kawaguchi, Saitama, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: RK HT. Performed the experiments: AF HT. Analyzed the data: AF. Wrote the paper: AF HT.