Japan is a fascinating country, scattered with places that tell ancient stories tinged with mystery, among these we find an enigmatic and fascinating site in northern Kyushu, located near Nagomi (和 水 町, Nagomi-machi), a city in the prefecture of Kumamoto ( 熊 本 県, Kumamoto-ken).
Outwardly it appears as part of the local landscape but inside there is a complex of tunnels, called "Tonkararin" (トンカラリン). To it we can add another fascinating place, not very far from the tunels, the important burial mound of Eta Funayama (江田船山古墳).
The Nagasaki archipelago is made up of more than 500 islands and houses a very particular one. Important from the historical point of view and for the past economy of the same Nagasaki: the island of Hashima or even Gunkanjima 軍艦 島.
This island was Japan's most important mining center on its surface, measuring 480m. of length for 150m. of width, accommodated more than 5,000 people during the most useful period, which means 1,391 inhabitants for hectare for the only residential area and 835 inhabitants per hectare all over the island, really amazing.