Nakagin Capsule Tower was once a futuristic symbol of Japan's postwar economic boom. Completed in 1972, this unique building consisted of 140 modular capsules that were intended to be replaced every 25 years, giving it a self-renewing design. However, over time, the building's maintenance was neglected, and it fell into disrepair. Despite attempts to preserve it, the tower is now in danger of being demolished, marking the end of an era for this once-iconic piece of Japanese architecture.