7 Days in Japan | How to spend one week in Japan. Travelling to Japan? Whether you have one month or one week in Japan, this Japan itinerary will help you visit some of the best things to see in Japan in one week. Seven days is far from long enough to see everything in the country, but you might be surprised but just how much you can do. Use this 7-day Japan travel itinerary to visit Tokyo, Kyoto, Osaka, Fuji and more in just one week.