Mount Haruna, Stratovolcano in Gunma Prefecture, Japan
Mount Haruna is a stratovolcano in Gunma Prefecture that rises to 1449 meters and contains a large caldera with a crater lake. The central cone, called Haruna Fuji, rises from the lakeshore and forms a distinct formation within the volcanic basin.
The volcano began forming more than 300000 years ago and went through several eruption phases. The last known eruption occurred around the year 550 and left the present caldera structure with the crater lake.
The central cone is called Haruna Fuji because its shape echoes the famous volcano. Visitors today rent pedal boats on the crater lake and walk along maintained trails, while local anglers fish on the frozen water in winter.
The summit area includes the crater lake, where boats can be rented. A ropeway connects lower areas to higher points and makes access easier for visitors with different fitness levels.
In winter the lake becomes a destination for wakasagi fishing, where anglers catch small fish through holes in the ice. Anglers sit in heated tents on the ice surface and enjoy this local winter tradition with freshly caught fish.
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