[uktokyoite]

You can buy a Suica card at Narita airport if you are coming into Tokyo from there. You will get a special deal - it's called NEx - this means you can use thge Narita Express train from the airport into Tokyo and then continue to use the Suica as you travel round using the trains or buses. All you do is swipe the card as you enter and leave the ticket gates at each station and it deducts the amount of money your journey costs.

You can 'charge' your card with as much money as you like and then add to it when you need to using the ticket machines in the stations. Each ticket machine has a button on the top right that lets you choose English as your language and then it's easy from there.

You can also use the suica card in some convenience shops to pay for goods. It is not a credit card though - you must have the funds on the card to pay for the items.

Regarding the 500 yen deposit. If you hand the card in at a JR office when you leave Japan - you can do this at Narita airport again if you are leaving that way - they return the deposit to you.