Tensoba, or tempura soba, is a Japanese dish of soba noodles and tempura.
There are two varieties of tensoba: one is served with a hot broth of and soy sauce; the other is served with cooled soba and dipped in (), either chilled or hot and usually strongly flavored. The dipping variety is also called or , depending on the soba shop or stand.
Like , tensoba uses many kinds of vegetable or seafood tempura, or (, using a mixture of vegetable or seafood bits).
Tensoba originated during the mid-Edo period. It was first eaten as a hot broth soba with , using the adductor muscles of surf clams. At that time, shrimp tempura-soba was more expensive than other ingredients. So, shrimp tempura-soba is also called () or .
There are some regional varieties for tensoba toppings. In Kanto and Kyushu, the soba shops often use (fried fish cake) or for tempura. These two fish cakes are sometimes batter-fried.