Lake Kuttara is a nearly perfectly circular caldera lake, formed within a volcanic crater. It is renowned for having some of the clearest and deepest waters in Japan, fed solely by groundwater and rainwater. This makes it a significant natural landmark, offering a stark, tranquil contrast to the active geothermal landscapes of nearby Noboribetsu.
Visitors consistently praise the lake's peaceful and tranquil atmosphere, often describing it as a beautiful, serene escape. Many highlight the scenic drive around the lake, especially during sunset when the light casts a golden glow on the water. The clean water is also noted, with some mentioning the possibility for children to play in it and catch small fish. However, a common sentiment is that while beautiful, it's not a place to spend a long time; most visitors find that a short stop for photos and to soak in the views is sufficient before moving on to other attractions like Hell Valley, which is considered more spectacular.
To make the most of your visit, consider combining it with a trip to Hell Valley (Jigokudani) and Lake Oyunuma, as Lake Kuttara is a natural extension of this route. A rental car is highly recommended, as public transport options are limited, and driving allows for stops at various scenic points and observatories around the lake. The drive itself is part of the experience, taking about 20-30 minutes to circle the lake. Bring a camera to capture the serene views. While some areas around the lake are undeveloped, offering a wilder feel, there are spots suitable for picnics. The best time to visit is during daylight hours, with sunset being particularly picturesque.
Lake Kuttara is easily accessible by car, located less than 15 minutes and 6.5 km drive from the Hell Valley parking area. Reviewers frequently mention driving there as part of a loop from Noboribetsu Onsen, often on the way back from Hell Valley or Oyunuma Pond. The road around the lake is asphalt but can be winding and narrow, so extra caution is advised, especially during high season. There are no specific public transport routes directly to the lake mentioned in reviews, reinforcing the need for a private vehicle.
A common complaint is the difficulty in getting a full, unobstructed view of the entire lake due to its undeveloped nature and surrounding forests. Some areas along the road can feel deserted. To mitigate this, seek out designated observatories or viewpoints mentioned by other travelers. Manage expectations regarding activities; this is primarily a scenic drive and a place for quiet contemplation rather than active recreation, apart from perhaps a short picnic or dip in the water.
