Soba resemble tagliatelle in their shape, although they are slightly less thick, and are made using buckwheat instead of durum wheat semolina. Soba are generally offered in the "kake soba" dish, where basically this buckwheat pasta is boiled and then served with a broth based on soy sauce, to which negi is also added. In Japan, soba are very popular and are practically offered in most public establishments, from the simplest and most basic ones, up to the most exclusive and refined ones: in all cases, it is customary to eat soba using chopsticks to the food.