Iyo City Mizui Elementary School Eco-Renovation is a sustainable educational facility completed in 2010, designed by Takashi Ueno Architectural Laboratory. Located in Iyo, Ehime Prefecture, this innovative project demonstrates a thoughtful approach to retrofitting existing school buildings with environmental consciousness. The eco-modification incorporates energy-efficient systems and sustainable design principles while maintaining functionality for elementary, junior high, and high school use. The project reflects contemporary Japanese architectural practices that prioritize ecological responsibility in educational spaces, making it an exemplary case study for architects interested in green building renovation and sustainable school design.