Hold on, you're overstating things here. When Fukushima was built they studied the topology of the surrounding oceans and the best models of tsunami generation

Hold on, you're overstating things here. When Fukushima was built they studied the topology of the surrounding oceans and the best models of tsunami generation at the time put the sea wall at Fukushima high enough to block everything they thought was possible from the strongest typhoons and tsunamis. The theory was wrong, there was a report in 2008 that concluded that a tsunami could possibly be large enough to overtop the sea wall. Furthermore, they didn't need to build some large expensive wall, they excavated the existing cliff in order to bring it down to 10 meters. They could have stopped at 15 meters if they had known that those waves were possible during construction. https://oilprice.com/Latest-Energy-News/World-News/Tepco-Removed-Natural-Seawall-that-Would-Have-Protected-Daiichi-Facility.html https://oilprice.com/Latest-Energy-News/World-News/Tepco-Rem...