Koma Bridge spans the Higashiyokobori River. The origin of the name of this bridge, which is said to have existed since the era of Toyotomi, is that there was a ``Koma no Murotsumi'' that welcomed envoys from the countries of the Korean Peninsula in ancient times, and that it was built during Toyotomi Hideyoshi's division of Osaka. There is a theory that this area was a base for trade with the Korean Peninsula. During the Edo period, a shogunate bulletin board (a bulletin board announcing the laws and ordinances of the shogunate) was erected at the west end of the bridge as a public bridge, and Koraibashi-suji was lined with Mitsui Gofukuten (currently Mitsukoshi Department Store) and Mitsui Ryogae Store, making it a lively area. was. It is said that during the Keicho era (1596-1614), it was a splendid bridge with imitation jewels. The Meiji government placed a mileage marker, a structure that indicates the starting and ending point of a road, at this Koma Bridge, and decided that this would be the starting point for calculating the distance of roads in western Japan. In 1870, it was replaced with an iron bridge imported from England for the first time in Osaka, and people at the time were astonished by its spectacular appearance, emitting a black luster under gas lamps, and it was nicknamed ``Kurogane Bridge.'' . The current bridge is a reinforced concrete arch bridge that was rebuilt in 1929, and the history of the bridge is evidenced by the imitation jewels on the railings and the pillars modeled after the turret mansion in the west part of the bridge.