Otsuka, Sadao
Murai, Toshiya
Funding for this research was provided by:
The Japan Kanji Aptitude Testing Foundation
Article History
Received: 10 August 2020
Accepted: 12 January 2021
First Online: 26 January 2021
Competing interests
: This work was supported by the Japan Kanji Aptitude Testing Foundation (<i>Nihon Kanji Noryoku Kentei Kyokai</i>). T.M received research funding from this foundation, and S.O. was employed by Kyoto University with this funding.