Long before the theory of plate tectonics emerged in the 20th century to explain the mechanism behind earthquakes, Japanese folklore had attributed the terrifying phenomenon to the thrashings of the o-namazu — a giant catfish that inhabited the bowels of the Earth.

And the sole power that prevents this fish from bucking the country to pieces is, according to ancient lore, Takemikazuchi — a Shinto deity living in Kashima, in present-day Ibaraki Prefecture — who balances rodeolike atop the o-namazu and holds down a massive "pivot stone" on the fish's head.

"As long as Kashima's deity is with us," says a verse from the eighth-century book of Japanese poems, the "Manyoshu," "the pivot stone may wobble but it will not break."