Reply to J. L. Derks et al. Issue 13 (1st May 2021) - Kenmotsu, Hirotsugu; Niho, Seiji; Tsuboi, Masahiro; Wakabayashi, Masashi; Eba, Junko; Asamura, Hisao; Ohe, Yuichiro; Watanabe, Shun-ichi