I was thinking bringing my drone while traveling to Japan and to take some videos. I did some research to learn about their local laws and this is what I found:
Daytime only and 30 meters away from everything
No flying over events
You need written permission to fly
Liability insurance not required
Stay 9km away from airport
Note the police are strict about not allowing drone flying in Japan cities and there are fines. The laws are changing rapidly so check before you fly.