Before our first trip to Japan I started looking into how we could access the internet from our smart phones. We had free wifi at the hotel, so that was good, but I really wanted to be able to use the internet wherever I was in Tokyo. I started to look up how it was with free wifi hot-spots but I gave up in the end. Sure you can go to Apple Store to use in store wifi and a lot of cafes have wifi, but I needed internet on the go while I was in Tokyo.
The main reason I needed internet on the go was so I could use some of the apps on my smart phone, like Google maps, since I always get lost while in Tokyo, and transport information apps, and of course I wanted to be able to use Facebook and check-in whenever and where I was and also be able to use Skype to so I could call home if needed.