Katsushin is a tonkatsu restaurant on the second basement floor of Solaria Stage, connected to the Tenjin Chikagai in Fukuoka. It serves thick premium rosu katsu and potato croquettes, and diners grind sesame seeds themselves to mix into the sauce. Around 2 p.m. there were no open seats, so entry came after a wait of about five minutes. Rice, cabbage, and misoshiru are refilled without limit, and the coating on the fried cutlets is firm rather than crisp.