In Osaka, where warehouses of rice and other products stood densely, the price of rice continued rising from around 1862, and since Iemochi TOKUGAWA entered Osaka-jo Castle as Seii Taishogun (literally, 'great general who subdues the barbarians') in 1864, major cabinet members of the Shogunate, territorial lords, hatamoto (direct retainers of Edo bakufu), and their vassals also came to live in Osaka, and its population increased rapidly.
蔵屋敷が集中する大坂では、文久2年（1862年）頃から米価の高騰が続き、元治元年（1864年）に征夷大将軍徳川家茂が大坂城に入って以後、主だった幕閣や諸侯、旗本及びその家臣たちが大坂に集中して急激に人口が増加した。