An old district near the famous fish market of Tsukiji, Tsukuda is known as the birthplace of tsukudani, a traditional Japanese dish that goes along with plain rice. Made from such ingredients as seaweed, fish, clam, and even locust on occasion, it is typically prepared by simmering the ingredients in soy sauce and a kind of sake called mirin so that it would hold up well for some time. Walk along the waterfront of Tsukuda today, and you would be in for a historic treat: there are numerous nearly-two-centuries-old tsukudani shops, lampposts designed in mock-Edo style,…