Mt. Haruna & Lake Haruna
Researched and written by Hinato
Gunma · Takasaki
36.4733°N, 138.8669°E
Mt. Haruna & Lake Haruna is one of the reasons Gunma keeps coming up whenever the conversation turns to Japan's landscapes.
Mt. Haruna (榛名山, 1,449m) is a dormant volcano with a crater lake (Lake Haruna, 榛名湖) at 1,100m elevation, surrounded by volcanic peaks (Mt. Haruna-Fuji, 1,390m, and Mt. Souma, 1,411m). The lake is a perfect circle (4.5km circumference), reflecting the surrounding mountains, and is popular for boating, fishing, and lakeside cycling. The area offers hiking trails, a ropeway to Mt. Haruna-Fuji's summit (views over the Kanto Plain and, on clear days, Mt. Fuji), and autumn foliage (late October-November) that turns the crater into a bowl of reds and golds.
The lake's Haruna Shrine (榛名神社) sits 3km downhill in a forested gorge, accessed via a 700-meter stone path through towering cedars and moss-covered rocks. The shrine's main hall is built against a massive rock face (御姿岩, Misugata-iwa), and the setting is powerfully atmospheric — ancient trees, waterfalls, and stone lanterns create a mystical forest shrine rarely seen outside Kyoto's mountains. The shrine is dedicated to fire and water deities, reflecting the volcano's elemental power.
Plan your visit
Time to allow
Lake + ropeway: 3–4 hours | With Haruna Shrine (3km away by car): full day | Shrine alone: 60–90 minutes
Hours
Lake area: open 24 hrs | Boat/bicycle rental: 9:00 AM – 5:00 PM
Closed: Ropeway: December–February (winter maintenance) | Lake and shrine: open year-round | Bus service: seasonal, check schedule
Best time to visit
Late October–November (autumn colors in volcanic crater) | July–August (lake activities and hiking) | January–February for snow scenery (ropeway closed)
Entry fee
Lake access: free | Haruna Ropeway: ¥840 round-trip | Rowboat: ¥600/30 min | Swan boat: ¥800/30 min | Bicycle: ¥500/hr | Fishing permit: ¥500 | Shrine: free
Getting there
Directions
Beyond the guidebook
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