COVID-19 in Japan: What could happen in the future? Nian Shao1 , Hanshuang Pan1 , Xingjie Li4 , Weijia Li1 , Shufen Wang1 , Yan Xuan8 , Yue Yan3 , Keji Liu3 , Yu Chen3 , Boxi Xu3 , Xinyue Luo3 , Christopher Y. Shen5 , Min Zhong10 , Xiang Xu9 , Xu Chen7 , Yu Jiang3 , Shuai Lu1 , Guanghong Ding6 , Jin Cheng1,2 , Wenbin Chen1,2,∗ 1 School of Mathematical Sciences, Fudan University, Shanghai, China 2