The prices aren't very cheap, no. You don't need a guide though, more fun to roam aimlessly (maybe not for everyone, but I prefer that). Or if you have a contact there, you could save alot of money by crashing their place. Renting rooms in Japan relieves you of a small fortune each day. Good thing to eliminate as much expense as you can from that area as it is a cancer on your wallet.
When (if) you do go, and somehow get treated with some green tea on the house, don't decline the offer. Drink it! Or they'll eat your soul as it's considered very rude...
How good is your japanese? Best to learn a couple of words and phrases. Not many english signs to go after, altough that has been improving lately.
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