sentences:  80% of the capsule owners must approve demolition, which was first achieved on April 15, 2007.A majority of capsule owners, citing squalid, cramped conditions as well as concerns over asbestos, voted to demolish the building and replace it with a much larger, more modern tower.In the interest of preserving his design, Kurokawa proposed taking advantage of the flexible design by "unplugging" the existing boxes and replacing them with updated units.