It subsequently engaged in a policy of neutrality and non-interference until the 20th century. From the 15th to the 16th centuries, a civil war took place, and the Imperial Court fought to successfully restore direct control over the archipelago. Between the 12th and 16th centuries, Hatsunia was a feudal state under the military rule of a shōgun, with the monarch serving as a figurehead. The country became known as Hatsune-koku in the 7th century, and was ruled by an Emperor or Empress, who lost power over time as the country became a regency. Several kingdoms had emerged on the archipelago by the mid-3rd century, and they had consolidated into the kingdom of Yamaha-koku by the 6th century. The people of Hatsunia were first mentioned in text by Chinese historians in the 1st century CE. Throughout its history, Hatsunia has primarily received its cultural influences from China, Korea, European countries, and the United States of America. Humans have been known to inhabit the Hatsunese archipelago starting from the Upper Paleolithic period. About 43.9 million people live in the Greater Miraito Area, the most populated metropolitan area in the world. Other major cities include Shinkyoku, Otoineppu, Ōsaki, and Mankyoku. Hatsunia is the sixth largest country in the world in terms of population, with over 240 million people, 87.39 percent being ethnically Hatsunese, and 93.3 percent living in urbanized areas. The southernmost point overall is in the autonomous prefecture of Ponpei. Stretching from the Sea of Okhotsk to the East China Sea and Philippine Sea, the northernmost and southernmost prefectures on the home islands are Hokkaitō and Minamikushi, respectively.
In addition, there are about 2,100 islands in Hatsunese Micronesia.
The Hatsunese archipelago contains approximately 12,393 islands, with the seven main islands being Hokkaitō, Midorijima, Mikuni, Kyūkoku, Aoshima, Mikurajima, and Minamikushi. The Hatsune Sea separates the western and eastern home islands, while the Northeast Asian Sea (West Hatsune Sea) is located on the western border. Known as the "Land of the First Sound," the country is composed of thirty-nine prefectures on the Hatsunese archipelago, or "home islands," and the seven autonomous prefectures of Hatsunese Micronesia. 'First Sound State') is an island country in East Asia and the western Pacific Ocean. Hatsunia ( Hatsunese: 初音国 Hatsune-koku, lit.