Shunsuke Sonoda defeated Kim Dae Hyun in Sunday's singles to secure victory for Japan over South Korea on the final day of the Hyundai Capital Invitational.
Katsumasa Miyamoto, Hiroyuki Fujita, Komei Oda and Kaname Yokoo all posted wins before Sonoda put Japan out of reach with a 3-under par 69, two strokes more than Kim in the seventh match at Haevichi Country Club on the resort island of Jeju.
Japan, which held a one-point lead after Saturday's fourball event, won 10.5-9.5. Both teams split the 10 singles matches on the final day.
Ryo Ishikawa, who teamed up with former high school teammate Sonoda on Saturday, suffered a final-day defeat 64-71 defeat to Japan tour regular Kim Kyung Tae, but victory was already in the bag after Sonoda had made it 5-2 with three matches left.
"It's been a valuable week," said Ishikawa, who beat Sonoda in a playoff in Japan last week to win the Fujisankei Classic for the second year in a row.
Sonoda said, "I am so pleased I don't think there is anything for me to say. It feels strange that I've been able to take part in this. I have had a really happy time and I hope I can continue to play in this tournament in the future."
South Korea won the inaugural Hyundai Capital Invitational in 2004. A venue and date for the next edition have yet to be decided although the tournament is expected to be held next year.