Biting into a firm, succulent piece of sushi or sashimi (yes, there is a difference between the two) and enjoying the crisp, almost sweet snap of a perfect morsel of tuna or mackerel is one of ...

The first time Katsuhiko Ueda, an “activist to popularize fish-eating,” tried “saba-zushi” (mackerel sushi) was in his college days when he visited a friend’s family home in Kyoto over ...