Lake Haruna is a caldera lake formed by the volcanic activity of Mount Haruna, often referred to as Haruna-fuji due to its conical shape. It's a significant natural landmark in Gunma Prefecture, offering a serene escape with opportunities for various outdoor activities. The lake's beauty, especially with Mount Haruna as a backdrop, is a consistent highlight for visitors.
Many visitors praise the stunning natural scenery, particularly the views of Mount Haruna reflecting on the lake. Activities like boating (paddle boats, swan boats, motorboats) and fishing are popular in warmer months, while hiking Mount Haruna is highly recommended for those seeking more active pursuits. Reviewers frequently mention the local delicacy, fried wakasagi (smelt) fish, available at lakeside restaurants. The area is noted for its peaceful atmosphere, especially during off-peak seasons, and the drive up to the lake is often described as scenic.
However, some visitors find the facilities around the lake, including souvenir shops, cafes, and restaurants, to be somewhat dated, giving a "stuck in the 1970s" vibe. While the lake itself is beautiful, some compare it unfavorably to more pristine lakes like Chuzenji in Nikko, though Haruna is considered more accessible. Winter visits offer a unique, quiet experience with a frozen lake and snow-covered landscapes, but many activities and shops may be closed. It's advisable to check the operating status of attractions if visiting in winter.
To get to Lake Haruna, many visitors recommend taking a bus from Takasaki Station. Buses heading to Lake Haruna depart from bus stop no. 2 at Takasaki Station. The bus ride from Haruna Shrine to the lake is only about 10 minutes. For those driving, the journey offers scenic views, but be prepared for narrow roads with hairpin curves. Parking is generally available, though specific details are not consistently mentioned in reviews.
A common complaint revolves around the perceived tackiness of some lakeside developments, such as brightly colored hotels and an abundance of swan paddle boats, which some feel detract from the natural beauty. To mitigate this, focus on the natural aspects: hike Mount Haruna, enjoy the views from different vantage points, or visit during quieter seasons. If you're not keen on the commercialized activities, simply enjoying a stroll around the lake or a coffee at a lakeside cafe can still be a pleasant experience.

