The chef at this shop is apparently the official protege of the original Hasshou owner, who still prepares okonomiyaki in Yagenbori downtown. As such, the shop is very well-known and usually packed to capacity, even on weeknights. Expect a wait time. However, as okonomiyaki usually takes a half-hour to prepare anyway, you can often put in your order while you wait and have it ready to eat by the time you sit down. Mayo and extra sauce are provided as a condiments at the table. (Often mayo costs extra in Hiroshima okonomiyaki shops.) I recommend sitting at the counter, as you can watch the chef's skill on the grill and pick up on some interesting eccentricities of the shop. For example, the chef here insists on ordering and using special double-yolked eggs in each of his creations.