This is the state of Lake Onneto as of Monday, December 2.
Parts of the lake’s surface are frozen, but the ice remains thin in many areas. In recent years, more visitors have come to see the ice bubbles, but places where natural gas escapes have very weak ice strength, and some spots may never freeze solid even in full winter. For that reason, walking on the lake is extremely dangerous and is not recommended by the local tourism association. As previously announced, Road 949 leading to Onneto (the gate in front of the hot spring) is scheduled to close on December 6. When you visit, please take thorough snow and cold-weather precautions, and enjoy Onneto in winter safely.