  In the paper by Hasegawa, Hagino and Tanimura (HHT) [Phys. Lett. B 808 (2020)
135693, arXiv:2006.06944], they concluded that quantum tunneling was simulated
by a time-dependent generator coordinate method (TDGCM). In contrast,
difficulties of TDGCM in describing quantum tunneling were pointed out by Ono
in the paper [Phys. Lett. B 826 (2022) 136931, arXiv:2201.02966]. Recently, HHT
submitted a comment [arXiv:2202.00513v1], by which they appear to give some
counterarguments to Ono's paper. Here I examine their arguments, reviewing the
main points of Ono's paper. The confusion in HHT's arguments may be mostly
resolved by recognizing how the wave packets interfere with each other when
they are coherently superposed.
