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 Pisoika Bay. 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 evolved into a single by 1995, when then Pisoika governor proposed a merger to streamline administration and increase residents' autonomy. Originally the seat of the Duchy of Reppet (三川公國), Ukotpet rose to national prominence in 1894 when it was designated as national capital upon the founding of the Republic of Sakushi. Thereafter, Ukotpet and the nearby port city of Pisoika rapidly expanded and industrialised. Ukotpet and Pisoika were officially established as independent administrative divisions in 1907 and 1913 respectively. The area was devastated by Allied bombing towards the end of the Eulhae War and underwent extensive reconstruction and expansion from the 1950s onward.

Today, Kiohin is a with the 70th largest urban economy in the world, accounting for over 43% of Sakushi's GDP.