This project is for a family, parent and a daughter, in a quiet residential area in Yokohama city, Kanagawa prefecture. The client has a extensive collection of precious music tapes and CDs in various media. To provide the space for archiving those collections is one of the important requirement of this project. Also, they preferred the space surrounded by wooden materials with warm atmosphere. "Archiving" and "Wood" are the key features of this project.We proposed "Fin-Frame" structure with thin Japanese cedar member, 40mm x 235mm, in gabled roof shape. The "Fin-Frame" spans maximum 6.6m and arranged at 300mm on center.The span of the frame varies per the planning and the structural system is balanced as a whole.At the ceiling and the wall, fins provide a rhythmical expression and are used as a shelves for archive.The house is located at the north side of the site. The interior spaces step corresponding with the sloped landscape of the site. On the 1st floor, living room and children's play room connected with small steps and provide a common character in the house. On the basement and the 2nd floor, the archive room and bed rooms are located.The "Fin-Frame" integrates those spaces and also, with changing the materials/colors between the fins, creates various character of each spaces.