Aakash Working Paper
（Online）ISSN 2436-9888
（Print） ISSN 2436-987X
Publisher：
Aakash Project, Research Institute for Humanity and Nature
457-4 Kamigamo-Motoyama, Kita-ku, Kyoto 603-8047 Japan
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
