Harukuni

Harukuni (春国) is the third-largest island in the Naichi archipelago and is one of the main islands of Yamatai. Located in the centre of the Naichi archipelago, Harukuni is located to the south-east of Ōshima, to the west of Akitsukuni, and to the north of Hōshima and Hasukuni. Harukuni is separated from Ōshima by the Aki Strait, from Akitsukuni by the Haru Inland Sea, from Hōshima by the Kobushi Strait, and from Hasukuni by the Miho Channel.

Dominated by a mountainous interior with three mountain ranges on the island, the majority of the population lives on the coastal lowlands. Harukuni has a population of 15,929,801 as of 2016. The island includes five provinces, Aki, Harima, Musashi, Nagato, and Niigata.

Located at the strategic crossroads between the main Yamataian islands, Harukuni has played a significant role in Yamataian history as the centre of governance, culture, and industry, with the city of Yamato having served as the capital of Yamatai for several hundred years. The mountain Tenzan Mountain holds significant cultural and historical significance to the Yamataian people, and is held as the location where the Empire of Yamatai was first formed in 470 CE. After governmental functions were shifted to Heian on Akitsukuni, Harukuni has become known as the industrial heartland of Yamatai, with strong manufacturing industries supplying Yamatai and her exports. Harukuni is also well-known as the location of numerous historically and culturally significant locations, artefacts, and buildings, and residents of Harukuni are believed to be cultured and traditional in attitude.

With the gradual decline of Yamatai's manufacturing industry in recent years and increasing competition from developments on Ōshima, the tourism and service industry has increasingly stepped up to fill the void in the economy of Harukuni, though today Harukuni still remains the centre of Yamataian industry in terms of gross output.

History
Harukuni was once the centre of Yamatai. Then it all changed.

Aki
Aki Province is located in the north-west of Harukuni, and includes the Narushio Peninsula, which protrudes into the Hokkai Sea. Aki Province gives its name to and has a long coastline along the Aki Strait. The capital is Akishio. Other cities in Aki include Akiyama, Kawazaki, Noda, Shōhen, and Tanigawa.

Harima
Harima Province is located in the south-west of Harukuni, and lies along the Aki Strait, with a coast on the Varunan Ocean as well.

Harima has historically been a strong shipbuilding province, and numerous shipyards were and are located here. Harima is also a major Varunan port. The capital is Mitakishima. Other cities in Harima include Harima, Noro, Ono, and Onomichi.

Musashi
Musashi Province is located on the south-east of Harukuni. It includes the Minamoto Peninsula, and has coasts on both the Haru Inland Sea and the Kobushi Strait. It is also the northern shore of the body of water known as the Miho Channel.

The capital of Musashi is Musashi. Other cities in Musashi include Akagi, Asakura, Minamoto, and Yamagishi.

Nagato
Nagato Province is located on the western coast of Harukuni, and lies along the Haru Inland Sea. Tenzan Mountain is located in this province.

Historically the heart of Yamataian administration and culture, Nagato is well-developed, wealthy and holds many sites of cultural and historical significance. After the government shifted to Heian, Nagato became developed as a strong industrial region, taking advantage of its sheltered position away from Yamatai's seasonal tsunamis and typhoons to be a secure base for strategic industries.

The capital of Nagato is the historical city of Yamato. Other cities in Nagato include Kishitani, Nagato, and Yūki.

Niigata
Niigata Province is located in the south of Harukuni, along the the Kobushi Strait. The smallest province on Harukuni, Niigata was historically a farming region. The province rapidly industrialised during the period of military rule, and is presently heavily industrialised, with a strong chemicals industry.

The capital of Niigata is Niigata. Another city in Niigata is Nīnuma.

Geography
Tenzan Mountain has an area of 46,631.226 km². The inland areas are dominated by two mountain ranges and taper towards the coast into hilly lowlands, and then coastal flatlands.

Mountains
Two mountain ranges can be found on Harukuni. In the south, the Kiso Mountains stretch from Harima to the start of the Minamoto Peninsula. They are joined in a roughly perpendicular direction towards the north by the Tenzan Mountains, which include Tenzan Mountain, the tallest mountain at a peak of 2,744 metres above sea level. The Tenzan mountains largely bisect Harukuni from north to south, and stretch from the central Harima and north-west Musashi to northern Aki.

Rivers
Twelve distinct river systems exist on Harukuni, three of which are fed by the caldera lake of Tenzan Mountain.