The Mouse Masion has been created by the writer Carina Schaepman. It is 3 m. high and 2 m. wide and has more than 100 rooms, it was used as illustration for the book. Everything in it has been made with things you find in your own house.
If you want the cheapest possible room for an evening in cities in Japan- maybe try a capsule 'room'. Salarymen who miss the last train home stay here. A room, a locker for your things, a shower room and a mini tv in your capsule.