To Japan you are going to stay in that place? If it is a three-star hotel in Tokyo, the center of the area, such as Shinjuku, probably also want to 900 yuan a standard, if it is a remote place, 600 yuan. Japanese rooms are very, very small and well equipped. However, if the transportation cost is spread out, I still think it's more convenient to stay in the center of the city. To go to Japan by boat did not try, airfare booked a month in advance, if about 3000 round trip it.