Otsu House is a minimal courtyard house located in Saga, Japan, designed by ALTS Design Office. The clients requested a space that would be enveloped in soft light. As a result, double-height ceilings were created in order to maintain visual transparency throughout the space. The residence is characterized by a series of arched walkways and entrances that promote the aesthetic of softness and curves. The entrance is blocked off by a wall that follows the lines of the main volume, creating an internal courtyard.