Not so much rugs, but... The tatami mats will probably need to be rotated every so often, as well as aired out on occasion. And the wooden flooring will need to be cleaned as well.

[He may note that the wood is extremely smooth - whoever built this building was careful to plane every piece of wood into a completely flat surface, negating any worry of splinters. Before long they arrive at a sliding door, which she opens to reveal a medium-sized room that opens out into the rest of the garden.]

...As you can see, there are also many antiques decorating the rooms. My father liked to collect them.