As the war became intensified, the construction of such a large-scale port city began to change into the Kobe Imperial Headquarters plan, and was developed into the concept of transferring the capital to Kobe by 'digging twofold or threefold moats around Mt. Mekko-san, and building the Rikyu (Imperial Villa) to receive his Majesty.'
戦争の激化と共にその大港都建設は神戸大本営構想と変わり「雌岡山に二重、三重の壕を掘り巡らして離宮を造営し陛下をお迎えする」という神戸遷都構想となった。