The cruise boats run to the middle of the lake and the four islands that make up Nakajima. Surrounded by the sound of gently lapping waves, passengers look out at Mt. Yotei, Showa Shinzan and Mt. Usu and the magnificent surrounding countryside. No matter what the season, the views are always spectacular. Evoking images of times past, Japan's largest catamaran 'Espoir' floats on the lake like a fantasy castle and during the Long- Run Fireworks Nights, visitors can admire the display from the lake on the nightly firework boat trip.