In instant Udon noodles or Udon noodles served in cheap stand-up-eating shops, simple Tempura-like food is often used to save costs and for other reasons, which is merely molded and hardened Tenkasu (crunchy bits of deep-fried dough produced as a byproduct of cooking tempura) gathered from the surface of the oil.
インスタントうどん、あるいは安価な立ち食いでは、コストなどの関係から、揚げ玉を寄せ集めて成形し、固めただけのものを用いることが多い。