Oden
Oden is a type of nabemono (Japanese one-pot dishes) consisting of several ingredients such as boiled eggs, daikon or konjac, and processed fishcakes stewed in a light, soy-flavored dashi broth. Oden was originally what is now commonly called miso dengaku [ja] or simply dengaku; konjac (konnyaku) or tofu was boiled and eaten with miso. Later, instead of using miso, ingredients were cooked in dashi, and oden became popular. Ingredients vary according to region and between each household. Karashi is often used as a condiment.
Source: Wikipedia
Recipes
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'Oden': Japan's traditional winter fast food - The Japan Times
The shelves of Japan's convenience stores change with the seasons, but winter brings a particularly unusual addition: stainless steel food warmers installed next to the checkout counter containing oden, a stew of tofu, boiled eggs, daikon, fish cakes...