Kosugiyu Tonari is a contemporary mixed-use residential and commercial building located in Koenji, Suginami Ward, Tokyo. Completed in 2020 and designed by T/H architects, this structure represents a thoughtful approach to urban infill development. The building seamlessly integrates housing units with retail spaces, creating a vibrant street presence while maintaining residential privacy. Its design reflects current architectural practices that prioritize functional efficiency and community engagement, making it a notable example of early 2020s Tokyo architecture that balances commercial vitality with residential comfort in a densely populated neighborhood.