How to book a cheap hotel in Japan?

2。 You don't need a window. You don't care about the scenery outside the window.

3。 The floor of the room is not limited.

4。 Book in advance 1 month or several months.

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If your Japanese is good, you can book a hotel called "Weekly Condominium, Weekly Apartment", that is, "hotel-style hotel for weekly or monthly rental". It's much cheaper than a hotel in the usual sense, and it's private, and you can cook for yourself. This is cheaper than going out to eat.