Kuroken-so is a residential project completed in 2004 in Karuizawa, Nagano Prefecture, designed by Tsukamoto Yoshiharu and Kaijima Momoyo of Atelier Bow-Wow. This modest dwelling exemplifies the architects' distinctive approach to contemporary residential design, characterized by thoughtful spatial organization and sensitive integration with its natural surroundings. The project demonstrates their philosophy of creating livable spaces that respond to everyday life while maintaining architectural integrity. Notable for its refined detailing and innovative use of materials, Kuroken-so represents an important example of early 2000s Japanese residential architecture that balances minimalist aesthetics with functional living spaces.