Koo Ji-won (具智元, Gu Jiwon; born 20 July 1994) is a Korean-Japanese professional rugby union player who plays as a prop for Japan Rugby League One club Kobelco Kobe Steelers. Born in South Korea, he represents Japan at international level after qualifying on residency grounds. He also changed his nationality to Japan after the 2019 World Cup.
Source: “Koo Ji-won”, English Wikipedia (CC BY-SA 4.0), excerpt