The father and son don’t speak to each other. They don’t need to. They barely look at each other as they go briskly, almost mechanically, from task to task. Beads of sweat glisten on their foreheads.

TOKYO (AP) — Tsukudani, a sweet, Japanese side dish often served with hot rice, originated in the samurai era in a tiny neighborhood called Tsukuda in the old part of Tokyo. Adding “ni” at the end of ...