Tontonton is a small teppan restaurant near Tenjin that serves Hakata-style okonomiyaki and yakisoba. The okonomiyaki comes topped with mentaiko mayonnaise, and the scallop butter grill is cooked on the teppan in front of you. You take off your shoes before entering, and on a Monday night at 10 p.m. there was a 30-minute wait. The yakisoba is on the salty side.