A 1972 mixed-use tower in Tokyo that was once considered a pioneering project in sustainable design has become the subject of a demolition debate. The tower, which consists of 140 prefabricated capsules, is plagued with poor plumbing, asbestos contamination and waterproofing problems. The idea of resiliency has entered the debate, and people are asking, "Is investing in a resilient building more sustainable than building anew?"

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