It was rumored at the time (and is the common view to this day) that this was because on the evening of the first day news arrived of an uprising having broken out in Higo Province which is thought to have displeased Hideyoshi.
これは1日の夕方に肥後国人一揆が発生したという知らせが入って秀吉が不快を覚えたからだという説が当時から囁かれており、今日でも通説とされている。