The formation of Luzhihu Lake was due to the eruption of Hakone volcano about 3,000 years ago, and debris flow hindered the formation of rivers. And this eruption volcano is Shenshan, the highest peak of Hakone, 1438 meters. Sitting on a cable car from Zaoyun Mountain to Dayong Valley, you can see the slopes and peaks of Shenshan Mountain. It takes about 1 hour and 20 minutes to climb the mountain from the Juyue cable car.