According to a request of my client, I tried to escort him from Tokyo to Nagano & Matsumoto to see Snow Monkey and Matsumoto castle IN A DAY, with moving around 600km by bullet train, local train, and express trains in mountainous area.. We have made it! It was in 12 hours.
Monkeys were really cute and fabulous! There were no fences in the monkey park, so we could imitate with monkeys. They never be dangerous. If you are an animal lover, this would be a memorable experience.