The Sanban Residence is where Kuki Sanban (Numbuh 3) and her family live. It appears to be quite large and expensive, in a rich neighborhood, and in very good shape, probably because Genki is the head of accounting at Mr. Boss's Firm. In Operation: S.N.O.W.I.N.G., it was the first time the inside of Numbuh 3's room was seen. However, it was only her bed and her window with curtains. Which appears to be really expensive and high quality.