Deep City (神奈京, Kanakyo) is a subterranean city built and owned by Yasaka Industries. It is located beneath Mongolia, and is a non-national independent territory.
History
In 2025, Yasaka Industries negotiated an energy trade agreement with the nation of Mongolia in exchange for sole development rights over the planned construction area. Development began the same year, and the city was opened for trade in 2030. During its five-year construction, Yasaka Industries utilized the city's growing energy infrastructure to mine five trillion Deep City Credits (KNK). This cryptocurrency was then traded internally and offered as credit to businesses that planned to open branch offices in Deep City. Of the five trillion Deep City Credits mined, only two trillion are traded publicly. Yasaka Industries' push to standardize Deep City investments with Deep City Credits allowed it to become an internationally competitive currency. To date, many corporations and nations accept Deep City Credits as currency.