Justa quick note for anyone looking for the cheapest hotel available. Here's the link to the cheapest Capsule hotel I could find in Tokyo. $15 USD per night for one person.
http://www.hotels.co...=3&MGT=1&YGF=14
I went with Airbnb and secured an apartment priced reasonably, so I won't be able to try out a capsule. Maybe next time
And the best priced pocket Wifi I found was the one on CDJapan. Its not letting me link it so just google: "CDJapan pocket wifi"
Longer plans save you more money.
Pretty much if you have a recent smartphone, you should be able to find some settings on your phone that says "Wifi". If you turn it on, it searches for a Wifi network connection. If you rent a pocket wifi, pretty much that little device will transmit a Wifi signal which you can connect to with your phone. It's very easy.