This project in the Wakamatsucho section of Tokyo’s Shinjuku district transformed an office building into a shared house hotel, where residents have private bedrooms but share common areas. Although the neighborhood is located near universities and busy shopping streets, it has a peaceful atmosphere all its own. Shared housing has proliferated in Japan in recent years, primarily drawing residents who seek interaction with their co-inhabitants. For a project in this particular type of neighborhood we envisioned a harmonious, cultured environment in which individuals with similar interests and tastes would gather and inspire one another. The forms and colors of the building are designed to create opportunities for this type of interaction. The existing entryway was left almost unchanged, while the building’s four levels were clearly divided according to function, with the first and second floors serving as private zones, the ground floor as a public zone, and the third rented out as independent offices. The interior design employs basic geometric forms, with circular furnishings and light fixtures on the first floor and square ones on the second floor. The ground-floor lounge is designed around a theme of lines connecting one individual to another. It is composed of a kitchen, dining area, shower room, and other shared spaces that serve as sites for interaction.