The Postal Service Museum is a museum where visitors can enjoy learning about the history and culture of the postal service and communications, based on the concept of Connecting Hearts and Minds, Connecting Worlds. The museum is divided into six different worlds of postal history and themes, with a permanent exhibition hall that displays approximately 400 items of domestic and international postal materials and 330,000 different types of stamps, a special exhibition hall where exhibitions and events are held four to five times a year, and a multipurpose space where exhibitions and events are held.
The museum introduces the history of Japan's postal, savings and simple insurance system, including Japan's first post (imitation) and postman's uniforms and bags. Postman, a post delivery simulator, and the "Postcard Creator" allows visitors to create their own original postcards.