In some cases, a small amount of grated yam is added to the dough. (After this, some stores leave the dough for half a day. They say it is necessary to leave the dough for a while in order to make fluffy takoyaki.)
生地に少量のすり下ろしたとろろを加える場合もある（店によってはこの後半日寝かす。ふんわりと仕上げるには寝かした方が良い、とのこと）。