The “House J” is a small house (100m2) situated in Yamaguchi-prefecture, Japan.This house was designed for a client in need of privacy and seclusion from the outside.The site is narrow (120m2) and is surrounded by residences. The “House J” has three floors that are built around a small inner garden.1st floor: dining room, kitchen, family space.2nd floor: study, reading space.3rd floor: bedroom.The three floors are connected together by a roof terrace.The spaces of the house are open toward the inner garden.The inner garden is also visible from the roof terrace.The inner garden is exclusive in a narrow site but the continuity between the interior and exterior spaces increases the size of the house.