Yes, when the dough is made, I would steam it. I just put the whole thing in a bowl (sprayed with oil) and put the bowl on top of a steamer and steam for oh, about 15 minutes or so (maybe longer). Then bring it out and roll the dough into balls. The mochi will be hot, so work quickly with it. The ladies in the mochi store I used to go to as a child had bandage tape wrapped around the end of their fingers while they did this.