This 20-story residential complex stands on a triangular site of approximately 4,800m2 bounded by two of Tokyo's major arterial roads. The complex shape has been segmented to achieve simplification and harmony with the surrounding cityscape. The site design attains a gentle flow from an adjoining public park to the privacy of residential garden space. The development targets urban dwellers who lead active lifestyles, and provides security, sound insulation and privacy. The building also employs a base-isolated structure, features ample disaster back-up systems, utilizes renewable energy sources, and maintains a 24-hour security system using a direct-supply high-voltage power source. Such amenities respond to increasing demands in the area of life continuity performance (LCP), and contribute to an advanced residential development that achieves a balance between security and environmental performance in a central urban setting.