Park Mansion Chidorigafuchi is a distinctive residential complex completed in 2004, located in Chiyoda Ward, Tokyo. Designed collaboratively by KAJIMA DESIGN and Naito Hiroshi Architects, this structure seamlessly blends exhibition spaces with residential units. Its strategic placement near the historic Chidorigafuchi moat area showcases thoughtful urban integration. The architecture demonstrates contemporary design principles while respecting the surrounding historic context. The building's combination of public exhibition facilities and private residences creates an innovative mixed-use development that serves both cultural and residential functions, making it a noteworthy example of early 21st-century Japanese architecture.