Maybe its fukuoka, that is y so different. I dont remember any
hotel in tokyo offer that kind of price. And some forumer point out
a v gd point, the normal kind of eatery offer min 400 plus to 500
yen for a meal. I hope ur transportation is already taken care of
beside the 700 sgd u have for ur allowance. Everything in japan is
expensive and given with the recent currency exchange, u will have
even less to spend.
But given that I will still choose japan. Do bring more $$ if
possible so u can pay tokyo a visit at least u come back to sg. Gd
luck ;)