To give you an example, a vending machine is 300 yen for a bottle of Coca-Cola, which is about 15+RMB a bottle. If you don't have a credit card, all the spending all depends on this 2000RMB (about 33000 + yen), a little less. Or do you seem to be traveling with a group or free? With the group is almost enough, because the basic food, accommodation and transportation are included, if free travel that is definitely not enough. Takeotei eel rice one about 6,000-8,000 yen, Kadokoro a set meal about 8,000-10,000 yen, Matsuya beef rice 500-700 yen, Ichiran ramen about 1,000, there are also some small stores are not bad, eat once a person about 1,000 or so. So if the five days of free travel, 33,000 yen is really hanging (this is still only consider eating, not counting transportation costs and shopping). If with the group that's okay, choose one or two good meal about 20,000 yen, the remaining 10,000 shopping. Overall Japan is a developed country, consumption is obviously much higher than China, whether you are Shanghai or Beijing, Tokyo consumption is higher than here.