Most of the views that 'he could not go back to Kyoto so quickly without any preparation' are mentioned by recent researchers, and there is no records to doubt 'Chugoku Ogaeshi' by warlords who had relations to Hideyoshi or TOYOTOMI clan at that time (if it was too quick from the viewpoint of warlords in those days, it is unnatural that warlords such as Nobukatsu and Nobutaka ODA, Katsuie SHIBATA and Ieyasu TOKUGAWA, who was against Hideyoshi later, did not insist it.
『事前に用意していなければ出来ない』とする説はほとんどが近年の学者が述べている発言であり、当時秀吉や豊臣家と関係があった武士からは敵味方を問わず中国大返しを疑問視した発言や記録は出ていない（当時の武士から見ても速すぎるのであれば後に秀吉と敵対した織田信雄・信孝・柴田勝家・徳川家康らがそれを主張しないのは不自然である）。