Isonade

The isonade as depicted in Takehara Shunsen's Ehon Hyaku Monogatari^{[citation needed]}

Isonade (磯撫で, "beach stroker"^{[citation needed]}) is an enormous, shark-like sea monster said to live off the coast of Matsuura^{[citation needed]} and other places in Western Japan.^{[citation needed]}

A Working Description of Isonade

Its body has never been seen,^{[citation needed]} as it is always "hidden beneath the waves, save for its huge tail fin which is covered in small barbs."^{[citation needed]} In theory it:

It approaches boats stealthily and uses its hooked tail to snare sailors and drag them into the sea, where it devours them. When it appears, fierce winds blow. It may also simply use its tail to capsize boats, or strike the beach with its tail and kill people there.^{[citation needed]}