Overnight leader Rikako Morita held her nerve to win her fourth title of the season at the Elleair Ladies Open on Sunday.
Morita, who teed off in the final round with a two-stroke lead over Momoko Ueda, made an eagle, four birdies, a bogey and a double bogey in a 3-under-par 69, finishing one shot clear of Asako Fujimoto at 15-under 273.
She claimed ¥18 million in prize money to regain the top spot in the money rankings with one tournament remaining in the season after she had been overtaken by Sakura Yokomine at last week's Itoen Ladies.
Mamiko Higa (66), Yukari Baba (67), South Korea's Lee Ji-hee (69) and Ueda (70) shared third place at 12 under.
Yokomine closed with a 69 and finished another shot back at 11 under in seventh.