The 0123 Harakka is a children's welfare facility designed by architect Tatsu Yokogawa of Yokogawa Design Workshop, completed in 2001. Located in Musashino City, Tokyo, this facility exemplifies thoughtful design tailored specifically for young children's needs. The architecture balances functional requirements with an inviting, nurturing environment that encourages play and learning. Yokogawa's design approach integrates the building seamlessly into its residential neighborhood while creating distinctive spaces that support childhood development. This project represents an important consideration of how architectural design can meaningfully enhance facilities dedicated to children's welfare and education.