A promenade leading to Sengataki with a 20m head in the upper reaches of Sengataki, which flows through the forest in the Sengataki district of Karuizawa-cho. In an area where untouched nature remains, you can take a forest bath while listening to the voices of wild birds. It is about 1.5km from the entrance of the boardwalk where the parking lot is located to Sengataki, about 25 minutes each way. The well-maintained promenade allows even small children to walk, and there is also a babbling square where you can play in the water in a mountain stream. Because of the wildlife habitat, try to bring a bear-repellency bell when walking.