Pleasure boat in going to Japan deep is the lake Tazawako deepest part just above the spot, and provides the experience that you can enjoy your stay in the water tent. And cobalt blue that comes from the depth of the lake, is a tour that you can hog the space of silence. The required time is about 2 hours. Of course also pleasure boat cruising to a popular spot Gozanoishi jinja! Evening and later you can enjoy also sunset and starry sky appreciation.