Osaka City (Japanese: 大阪市; cultural language: Osaka City) is a city in Osaka Prefecture, Japan, and the seat of the prefectural government. It is located in Osaka Bay at the mouth of the Yodogawa River in the Kinki region of Honshu.
It has a history of more than 1600 years since Naniwa Palace was built in the 4th century.
The daytime population is second in all of Japan after Tokyo's 23 wards, and the nighttime population is the third after Yokohama City. In 1956, it was the first city in Japan to be designated as an ordinance-designated city. It is the largest in the non-Kanto region, and it is a place where many Koreans living in Japan live.
Due to the invasion of Jomon period, Osaka Bay was created, and a peninsula was created in which the Uemachi plateau protruding from the southern part was defrauded, and the eastern part became Hanae Bay. Through this, it is thought that the present-day Uemachi area was composed of the inland sea and peninsula to the east. In the middle of the Jomon period, people were already living in groups, leading a life such as fishing and gathering, which came to be known from the piles of clams, oysters, and remains found at the remains of Morinomiya in the 5th to 6th centuries BC. In the Yayoi period, the peninsula became a key province, and Hanae Bay was desalinated and eventually became Lake Hanae. The area around Lake Hanae benefited from the natural environment, and with the development of agriculture such as rice farming, permanent and large-scale collective settlements appeared on the plains, and it became a base for shipping and trade with the continent. The origin of the town of Osaka is the Uemachi plateau protruding from the estuary of the Yodo and Yamato Rivers at the edge of Osaka Bay. In the Kofun period, Osaka was developed as a central port connecting the western regions of Japan. The increasing number and size of the tombs found in the Osaka Plain gave evidence of a concentration of political power and led to the formation of a nation. In the 5th century, Namba Gozu Palace was built. In the 5th and 6th centuries, continental culture was introduced and naturalized people came and settled. In 645, Emperor Gotoku built Naniwa no Nagarano Toyosaki no Miya in Osaka and the capital Naniwakyo was established in this area. It became a modern city called Naniwa. This name is still used as Naniwa-ku. Although the capital was moved to Asuka in 655, Naniwa remained an important link for amphibious transportation between Yamato and Korea and China. In 744, Naniwa became the capital again at the request of Shomu. Naniwa's becoming the capital ceased in 745, and the Imperial Palace returned to Heijo-kyo (present-day Nara City). Although the port's function was moved to neighboring areas towards the end of the Nara period, it remained a vibrant center of amphibious transportation linking Heiankyo with the rest of the world. and was established on the grounds of the Imperial Palace. In 1570 Oda Nobunaga's attack began. Ten years later the monks surrendered and the temple was destroyed. In 1593, Toyotomi Hideyoshi built Osaka Castle on the site of Ishiyama Honganji Temple. From 1614 to 1615, Tokugawa Ieyasu attacked and captured Osaka Castle. became Then, the Aji River was opened to fill the Yodogawa River, making it a city where water flows throughout the city just like Venice. For many years, Osaka has been Japan's economic center, with a large proportion of its population belonging to the merchant class. Through the Edo period, Osaka grew into one of Japan's major cities, a vibrant and important port.