Katsuou is a Japanese-style tonkatsu restaurant in Apgujeong, Seoul, serving tonkatsu and curry together. The menu centers on thick cuts of meat in crisp breading, with rosu, hire, and spicy cheese katsudon options. At lunchtime, customers crowd in and the space is small, so there can be a wait; after checking a QR code, you take a seat. The tonkatsu is on the greasy side.