There are old stone tsunami markers in coastal areas around Japan. "Don't build below this point."

The Fukushima nuclear facility was built below that point.

> "It takes about three generations for people to forget. Those that experience the disaster themselves pass it to their children and their grandchildren, but then the memory fades," Fumihiko Imamura, a professor in disaster planning at Tohoku University, told the AP.

https://www.smithsonianmag.com/smart-news/century-old-warnin...