[chompalomp2]

With regards to food, I found you could get 2 meals a day from a decent bakery for very cheap (~ 700 yen), however, these kinds of meals are very unhealthy for you, and I could only do it twice a week maybe; otherwise I'd get sick of it straight away. Also, for drinks, try to find a good vending machine. Just outside the place I was staying in Tokyo was a vending machine with 120 yen 500 mL cans of soft drink and bottles of water, but you might find yourself paying 300 yen for this around tourist attractions (or a 200mL can at the top of Miyajima for 300 yen!).