For that reason, it is said that Sakai was incorporated into Osaka to bring Osaka's size up to the level where it was fit to be called a 'Prefecture,' as it was the smallest in size compared to Kyoto, Tokyo or other peripheral prefectures and as the economy of Osaka had hit the bottom due to bad debts incurred by loans made to Daimyos (feudal lords) in addition to continuous bankruptcies of money-exchange businesses from the abolition of silver grain currencies.
そのため、府域が京都、東京や周辺地域と比べて最小で銀目廃止令による両替商の相次ぐ倒産に大名貸の不良債権による大阪経済の地盤沈下もあり大阪府を「府」に相応しい規模にするために行われたと考えられている。