Koo Ji-won

Koo Ji-won (born 20 July 1994) is a South Korean-born, Japanese rugby union player who plays as a prop.[1] He currently plays for the Sunwolves[2] in Super Rugby and Honda Heat in Japan's domestic Top League, and the Japanese national team.[3][4]

Koo Ji-won
Date of birth (1994-07-20) 20 July 1994
Place of birthSouth Korea
Height1.84 m (6 ft 0 in)
Weight122 kg (19 st 3 lb; 269 lb)
Rugby union career
Position(s) Prop
Current team Sunwolves / Honda Heat
Senior career
Years Team Apps (Points)
2017–present Honda Heat 0 (0)
2017–present Sunwolves 14 (0)
Correct as of 5 December 2017
National team(s)
Years Team Apps (Points)
2017–present Japan 8 (0)
Correct as of 15 September 2019
Korean name
Revised RomanizationGu Jiwon
McCune–ReischauerKu Chiwon


After only two Super Rugby appearances for the Sunwolves, which included one start, Koo received his first call-up to his adopted country, Japan's senior squad ahead of the 2017 end-of-year rugby union internationals.[5]


  1. "Ji-won Koo ESPN Scrum Player Profile". ESPN. Retrieved 5 December 2017.
  2. "Koo Jiwon". www.ultimaterugby.com. Retrieved 2017-12-05.
  3. "Koo Ji-won itsrugby Profile". itsrugby. Retrieved 5 December 2017.
  4. "Koo Ji-Won". Japan Rugby Club. Retrieved 2017-12-05.
  5. "Tighthead prop Koo Ji-won set to earn first cap for Japan against Tonga". The Japan Times Online. 2017-11-17. ISSN 0447-5763. Retrieved 2017-12-05.
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