“High dwellings are the peace and harmony of our descendants,” the stone slab reads. “Remember the calamity of the great tsunamis. Do not build any homes below this point.”

It was advice the dozen or so households of Aneyoshi heeded, and their homes emerged unscathed from a disaster that flattened low-lying communities elsewhere and killed thousands along Japan’s northeastern shore.

Hundreds of such markers dot the coastline, some more than 600 years old. Collectively they form a crude warning system for Japan, whose long coasts along major fault lines have made it a repeated target of earthquakes and tsunamis over the centuries.

via Tsunami-hit towns forgot warnings from ancestors – Yahoo! News.