In Japan, it is possible to book different sorts of accommodation to lodge during your travel.
Of course, Western-style hotels are extremely numerous, but the size of their surface happens to be quite limited, especially in the big cities, unless you are able to spend more money.
More traditional lodging, such as ryokan or minshuku, are also demanded as their costs are not as high as we might fear.
For families or travelers willing to live locally, renting an apartment or a house is very interesting and cost saving, depending on the number of person in the group.
Finally, for low budget, guest houses or dormitories system is very used, especially in Tokyo.