Advances in Artificial Intelligence : Selected Papers from the Annual Conference of Japanese Society of Artificial Intelligence (JSAI 2020) - Yada, Katsutoshi; Abe, Akinori; Ito, Takayuki; Kashima, Hisashi; Katagami, Daisuke; Matsumura, Naohiro; Mori, Junichiro; Sato-Shimokawara, Eri; Takama, Yasufumi (Springer, 2021)