https://www.alojapan.com/1238006/massive-underground-infrastructure-protects-the-tokyo-metropolitan-area-from-floods/ Massive underground infrastructure protects the Tokyo metropolitan area from floods #DisasterPreparedness #floods #Kasukabe #Saitama #Tokyo #TokyoTopics #tourism #東京 #東京都 This is a sponsored story, created and edited exclusively by Tokyo Metropolitan Government’s Tokyo Updates website. The Tokyo metropolitan area aims to be disaster-resilient and to protect its citizens from natural disasters. With many rivers flowing through the area, author…