Three case reports on the cometary plasma tail in the historical documents Hisashi Hayakawa, Yuri I. Fujii, Koji Murata, Yasuyuki Mitsuma, Yongchao Cheng, Nagatoshi Nogami, Kohei Ichikawa, Hidetoshi Sano, Kohji Tsumura, Yukiko Kawamoto and Masaki N. Nishino J. Space Weather Space Clim., 11 (2021) 21 Published online: 08 March 2021 DOI: 10.1051/swsc/2020045