HIRONO, Iwate Prefecture--Sea urchin are a culinary delicacy, but because their shells are often seen as too difficult or costly to recycle, they end up getting tossed out in bulk. But a local ...

Run a sharp paring knife between the clam and the shell ... Arrange the sea urchin (uni) pieces on the clams. Use a fine-tooth rasp-type grater to shave the dried fish roe (karasumi, wuyuzi ...