Visit a local onsen (bath house)
Visit a grocery store usually located in the basement of a large department store.
Visit the fish market at 4:00 AM
Quick Tips:
Eat at a local yakatori, eat at local shushi bar, drink in local izakaya.
Best Way To Get Around:
Public transportation is the best in the world. Subway, train, bus, or taxi. Walk; it is good for your health.