Hironori Sakamoto and his wife plan to spend the next few nights at a spacious, fully furnished two-story house with a large wooden deck in Kitami, a quiet suburb in Tokyo’s Setagaya Ward.

They’ll then move to another home in the neighboring district of Tsurumaki, which they have registered as their official residence. Then they’ll decide where to go next — maybe a place in the mountains or somewhere by the sea.

In that regard, they are spoiled for choice: Including the Kitami and Tsurumaki properties, there are nearly 90 shared homes across Japan where they can stay as long as they pay a set monthly fee.