天守台の西側は石組によって南北が隔てられており、通路となった個所の門を仕切門と呼んだ。北から本丸中心部へ侵入しようとする敵の直進を妨げるため両脇の石垣を行き違いとし、そのため門は東に向いていた。徳川幕府による大坂城再築時に築かれ、明治維新の大火により石垣上にあった塀ともども焼失したと考えられる。
The west side of the castle tower base is divided into north and south by stonework, and the gate at the passageway was called the partition gate. To prevent enemies from advancing straight ahead into the center of the main citadel from the north, the stone walls on both sides were made to pass each other, so the gate faced east. It was built when Osaka Castle was rebuilt by the Tokugawa Shogunate, and is thought to have been destroyed in the great fire of the Meiji Restoration, along with the wall that was on top of the stone walls.