Kiohin

Kiohin (: 京濱), officially the Kiohin Metropolis (Cheonja: 京濱都, Kiohin To) is the and most populous administrative division of Sakushi. Located in the North Sakushi region, the metropolis stretches from the confluence of the Ishikar and Satporo rivers to the East Sea coast. Kiohin is the political and economic centre of Sakushi and the seat of its national government. As of 2020 the metropolis had a population of over 6.064 million, and its metropolitan area was the 46th most populous in the world with over 7.641 million residents.

Kiohin was created from the merger of Ukotpet Capital (合川京), Pisoika Prefecture (濱越府), and several cities of Reppet Province (三川州) in 2004. They had formed a single metropolitan area by 1995, when then Pisoika governor proposed a merger to streamline administration and increase residents' autonomy. The area came to national prominence in 1894 when Ukotpet was designated as national capital, it being the seat of the Duke of Reppet who supported the victorious republicans in the War of Sakushin Unification.