The guest house on Rokkenjima, also known as the Toraian (渡来庵?), is where the younger members of the Ushiromiya family reside during the family conference. The guest house was originally built by Krauss Ushiromiya as a hotel in a failed attempt to convert Rokkenjima into a resort. The ten-room guest house has two stories and the doors of the house can be locked from the inside. The room in which the cousins stay during the family conference is on the second floor. The only way to access the second floor is through a stairwell in the lounge on the first floor.