Tororo Soba (Slimy soba noodles with grated nagaimo)

This is not a full recipe per se, since I've already written out the instructions for making the components previously, but rather a how-to. It's a cold soba noodle dish that may be a bit unusual for most people, unless you grew up in a Japanese household or have lived here for some time. (There are also regional and individual preferences for this kind of dish.) Basically it's cold soba noodles served with a big dollop of grated raw nagaimo, which is very slimy and slippery. People usually either love it or hate it, as with other well loved slimy foods in Japan such as okra and natto. (See the Slimy slimy bowl of goodness.)

In any case, this is a nice refreshing dish that, well, slides down easily, that is great when the weather is not too cold. I cannot guarantee you will love it, but I hope you give it a try if you are adventurous!

Recipe of sorts: Tororo soba

Basically, follow the recipe for cold soba noodles with dipping sauce.

The soba in this case is 100% soba or buckwheat flour soba, but any kind of good soba will do. (100% buckwheat soba is rather stiff and a bit chewy when cooked.)


You also need a good bowl of grated nagaimo, or tororo. Nagaimo makes some people get itchy if they handle it, though in most cases they can eat it without any ill effects. See how to handle nagaimo in my okonomiyaki instructions. For 3 to 4 people, you'll need about 2 cups of grated nagaimo.


As condiments, you should have some chopped green onion, shredded shiso leaves, perhaps some grated fresh ginger.

Lay out the soba noodles on a flat soba serving sieve or seiro (use a colander if you don't have one of these), put out the bowl of tororo and a small plate of condiments. Put some dipping sauce in small bowls or little soba serving containers called sobachoko. Each person puts some soba and tororo in their bowls with condiments. Here's my stepfather serving himself a good dollop of tororo. Yep, it's sliiimy!


Here's how a serving of tororo soba looks like.


Repeat the procedure until you're full. Delicious!

Note: if you get a bit itchy around your mouth from the tororo, just rinse it off with plain water.

Yes, I know, Japanese people love slime. What can I say.... ^_^;

(I've made this my contribution to the Twitter #twitterfoodparty (this time it's a #twitterpastaparty). You can follow my general tweeting at @makiwi, or Just Hungry and Just Bento site updates on @justbento.)

Filed under:  japanese offbeat noodles soba japan washoku tororo nagaimo slimy

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One of my favorite dishes! I love it with good juicy umeboshi. Drool!

My husband bought a long yamaimo on the slopes of Mount Takao on our first visit there and we brought it back to Tokyo. We peeled it, grated it and had it with soba just as you described. Yum!
However, as we had some left over (we only peeled and grated half the root) we grated the rest of it the next morning and mixed it with hot rice, a raw egg and a bit of soy sauce.

At first I was a little intimidated by nagaimo and for the first couple of months in Tokyo and didn't attempt to cook with it. When I finally did get some to make okonomiyaki I was surprised by how easy they were to prepare! They grate so easily!

Now I'm back in the states and wondering if I can find them again... and wondering what horrors I could concoct if i were to introduce it to western cooking/baking.

Nagaimo is pretty easy to find in Asian supermarkets (at least in MD). It's shockingly expensive though.

i could have *sworn* that said totoro soba!
still looks good though ^_^

Yum! I had tororo soba at Soba Koh in NYC on an unseasonably hot September day--so refreshing! I live in San Francisco where it's easy to get nagaimo so I will try this at home.

weird, in my country we used to eat the tororo too.. i never ever know someone that deslikes it.
but i wanna try the japanese way..
by the way, i love your and yours sister website


In terms of slime and roots, are nagaimo and yamatoimo interchangeable? I've never really understood quite what the difference is, except that they look slightly different and yamatoimo is way more expensive at the supermarket. Anyway, thanks for the recipe. I'm a slime fan whether it's slung over noodles or tuna or just plain rice.

Andrew, from what I can tell they're both names for the same plant (Dioscorea opposita) but perhaps someone with more direct experience could note whether they're separate subtypes or something.

Very interesting! I think I will try this :)

Do you have any home-cooked Japanese Fall favorites up your sleeve? I love Fall, I love food, and Japanese is my favorite :). I'd love a few ideas of something I can cook at home to celebrate the season!

I guess I'm in the minority here, but I can't stand the stuff. But then, I do don't slime in general. I've tried the slimy foods of Japan, and most of them just repulse me. But I'll happily take the noodles without the slime! :)

I love it!!:X today, i watched the drama 'Osen" and it's about tororo with rice :X:X: REally want to try it!

This looks so good! I have allergies, so I usually just eat soba with salt. But using tororo would make a great "sauce"! Love your site :)

I grew up with Tororo and it's an all time favorite, but now I've moved out of my parents and I can't find a Grated Bowl that my Dad uses to make it ANYWHERE! :( I would Love to be able to make this for my family at home and not just have it when we visit my parents. I live in the US and I'm wondering if you know any place I could buy the bowl to make it? I always just called it a tororo bowl so I don't even know where to begin to look for it. :D If I can ever get a hold of a bowl I will enjoy making this recipe! Thank you!