Could I do this......??????

The chances of this happening are less than zero. No Japanese landlord is going to rent to a college girl with two dogs.Such an apartment would cost you $1,500 a month,Plus two or three months rent in advance.Plus another months or two rent in "key money".Key money is more or less a bribe to the landlord to be able to rent his property.This is money you'll never see again. After your visa expires, you have to leave the country.