Kenichi Kuboya of Japan beat compatriot Katsumasa Miyamoto in the first playoff hole on Sunday to win the Panasonic Open.
Kuboya fired a 7-under-par 64 in the final round to finish tied with Miyamoto (68) at 11 under 273.
Kuboya started the final round six strokes off the lead but made up ground on Sunday with seven birdies in a bogey-free round at the Chiba Country Club.
South Korean Kim Seung-hyuk shot a 69 and tied for third place at 10 under 274 with overnight leader Hwang Jung-gon and Japan's Mikumu Horikawa.
Jason Knutzon of the United States, who led the first two rounds, had an even-par 71 in the final round to finish tied for 15th place at 5 under 279.
Defending champion Yuta Ikeda struggled with the windy conditions for a 73 and tied for 36th place.