Japan (Mermachines)

History
When Kraventhorn emerged in the summer of 1946, the bomb was proven to be lethal to humans but not to merpeople. An estimated 113.000 human survivors lived in Japan in a number of cells.

When that occurred it had been a year since war ended in Japan and the country was still under Allied administration. Since it was believed that foreign contact was ceased, the Japanese made the country a sakoku again between September 1946 and October 1949 - the first New Sakoku - then the country absorbed the small New Ryukyuan Kingdom and its territorial waters in November 1949. The country returned to sakoku status in 1950, and remained that way until 1963.

As a closed country, though, the country witnessed an unprecedented post-Kraventhorn economic miracle that was first noted in 1952, with the rise of a new generation of post-Kraventhorn children and families with five or more children, particularly in the rural areas, by 1960, the country had surpassed 200.000 people.

The need to make the country free again was made in 1962, when people in western Japan were picking up radio broadcasts from Chinese rump governments (especially the one in Shanghai), Taiwan and Korea, prompting Japan to start opening up to Asia and later, the world.