Kussharo-ko is a popular place to escape from the hustle and bustle of daily life. Check if any water activities are on offer here, or simply enjoy the calming ambiance.
To explore this body of water, you'll need to find your way to Kawayu Onsen. There are plenty of other interesting attractions in this area, like Lake Mashu, Kawayu Onsen Kawayu Kosyu Yokujyo, and Mount Io.