What does flat face mean? I think Japanese girls' faces are the most stereoscopic among the three countries in East Asia. Generally speaking, they have deep eye sockets and very straight noses. To say flat or Korean girls flat, pie face means big flat face. Many people in Northeast Asia have sunken noses, shallow eye sockets and flat faces. Of course, plastic surgery the day after tomorrow may confuse you, thinking that they are originally big eyes and high noses, but they are not ~