Curry nabe is combination of two of Japan’s great comfort foods: curry-rice (karê raisu, カレーライス) and nabe (鍋). Curry-rice is a Japanized version of Indian curries via Britain: served with rice, this dish is a thick, brown sauce, more sweet than spicy, combined with onions, carrots, potatoes, and chicken or beef, which are sauteed before boiling in the sauce. If mac ‘n’ cheese and spaghetti are the epitome of basic American home cooking, curry-rice tops Japan’s list.
Most curry roux in Japan contain meat extracts (beef, pork, or fish are the most common). I am found of Sokensha‘s vegan* curry “flake type” roux (植物素材の本格カレー), which is sold in health-food stores like Noppo-kun but can also be ordered online. I like the “spicy” one (辛口), even though it’s not all that spicy. This “Curry for Vegetarians” by Sakurai is also vegan, though I haven’t tried it. (Edit: Haiku Girl recommends S&B’s exported Torokeru (とろける) curry roux blocks, but the domestic varieties sold in Japan appear to contain chicken or beef bouillon [ブイヨン].)
Then, of course, is the staple of Japanese winter cuisine: nabe, from nabemono, which refers to foods cooked in a (clay) pot. Nabe, like curry-rice, is completely adaptable to taste: use whatever tofu, vegetables, and/or meat you like and boil them in a broth of your choice. It’s like non-committal soup, and it’s great for casual dinner parties. You can purchase broth in a variety of flavors from soymilk to kimchi at any grocery store, but I prefer to make my own, and it’s really quite simple. (How did you guess?)