Kiyohiko OGAWA (an astronomer) expressed his view in 1915 that the above date was not a day of low tide according to his calculation, and that Yoshisada passed over Inamuragasaki through seawater when the bakufu forces had their guard down, based on their thinking that Nitta forces would be unable to pass over Inamuragasaki.
1915年に小川清彦(天文学者)がこの日前後の稲村ヶ崎における潮汐を計算したところ、同日は干潮でなく、実際には幕府軍が新田軍が稲村ヶ崎を渡れないと見て油断したところを義貞が海水を冒して稲村ヶ崎を渡ったとする見解を出した。