Katouko

Katouko District (かとうこ县; ka-tou-ko-do) is a district under Shinsu Prefecture. As of 2018, it has a population of 9 million.

Etymology
Many theories have sprung up about the name Katouko, as it can be read in a number of different ways. Like all place names, Katouko is written in phonetic kana characters; in older documents it may be written as かとうこど due to the absence of the character 县.
 * Some etymologists have said that the name comes from Old Kayonese kato, meaning 'strong', and the word ko, meaning 'wall'. Therefore its meaning could be 'place of strong walls'.
 * Others have theorised that the name comes from Old Kayonese kae ('bird'), tou ('journey') and kou meaning 'end' or 'stop', suggesting a resting place for migrating birds.

Cities

 * Akadan
 * Hibun
 * Toyou
 * Namawa
 * Yashi

Towns

 * Sonsu
 * Asou
 * Monji
 * Sumei
 * Souhan
 * Kunami

Villages
In total, Katouko District has 5 cities, 8 towns and 8 villages.
 * Howai
 * Shibaya
 * Hapu
 * Ishon