You'll find the heart of the Japanese Alps in the crystal-clear waters of the Azusa River. The main walking trails here are mostly flat and well-maintained, making for a relaxing stroll through some of Japan's most breathtaking mountain scenery. As private cars are banned, you'll arrive by bus, stepping out into a pristine valley where the air is crisp and the only sounds are the gentle flow of the river and birdsong. Plan for a walk of a few hours between Taisho Pond and the iconic Kappa Bridge to fully soak in the serene atmosphere.