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Middle area
Kumamoto City
Kumamoto City
Kumamoto (熊本市 Kumamoto-shi) is the capital city of Kumamoto Prefecture on the island of Kyushu, Japan.   As of June 1, 2019, the city has an estimated population of 738,907 and a population density of 1,893 persons per km². The total area is 390.32 km².

https://en.wikipedia.org/wiki/Kumamoto

Aso region
Aso region (!)

Aso's caldera is one of the largest in the world, 18km from east to west, 25km from north to south. In the plain that spreads over a vast caldera created by four huge pyroclastic eruptions, about 50,000 people live with the volcano, and the surrounding area has been handed over by the people for over 1000 years The vast grassland that is maintained by and the rich land that has been nurtured by the improvement of farmland over the years spreads and rich crops are growing.

https://en.wikipedia.org/wiki/Aso,_Kumamoto