The volcanic complex, located about 300 km (190 miles ... but dozens around the lake, some of which have formed in the last 2,000 years. "This (volcanic) system is quite recent and therefore ...

ASO, Kumamoto Prefecture--Tourists could enjoy the rare view of the lake in the No. 1 crater of Mount Nakadake in the Aso volcano complex here turned green for the first time in six years.