Kiso is a region located in the Nagano Prefecture of Japan, known for its beautiful landscapes and rich cultural heritage. It is famous for the Kiso Valley, which features the historic Nakasendo Trail, an ancient route that connected Kyoto and Edo (now Tokyo). The area is also recognized for its traditional wooden houses and the preservation of old post towns like Magome and Tsumago. The Kiso region is home to the Kiso River, which flows through the valley, providing scenic views and opportunities for outdoor activities. Additionally, Kiso is known for its local crafts, including Kiso lacquerware and Kiso cedar, which are highly valued for their quality and craftsmanship.