Liquefaction, an unusual phenomenon in which an earthquake under sandy earth overlaying a water basin causes the water to rise, has been confirmed by a couple of science guys to have occurred in Kawashiri, according to the Kumanichi. The science guys theorize that the liquefaction zone traces an ancient river branch which connected the present Shirakawa and Kasegawa rivers (a map is presented at the link). I mention this due to my concern of an earthquake in Yatsushiro, at the southern end of the Hinagu Fault which has yet to rupture. Apparently, Route 3 through that area used to be at the seafront; the vast area between that and the sea today is all landfill, and thus highly vulnerable to liquefaction.