Lake Harunako is about 30 kms from Takasaki. We took the bus from in front of the JR Station (bus no 2) It took around an hour and 20 minutes to get to the lake and we did not expect to see what was there. The lake was completely frozen over. Quite strange to see boats on the shore of a frozen lake.
The lake is actually the caldera of a dormant volcano – Mt Harunafuji, the large mountain in the background that looks a lot like Mt. Fuji hence it’s name.