In the all Japanese women's singles final, Mine showed her quality as she overcame Kawakami in four games.

Mine took the first 12-10 before Kawakami levelled the match, taking the second 11-7.

The third seed, Mine, began to display her superior quality and proved too strong for her opponent, winning the third and fourth games 11-9 and 12-10 respectively.

Indonesia's Muhammad Rian Ardianto and Fajar Alfian shocked home favourites and number one seeds Chen Hung Ling and Chi-Lin Wang in the men's doubles final.

The unseeded duo silenced the crowd inside the Hsing Chuang Gymansium as they overcame the tournament's heavyweights in a five game thriller.

Ardianto and Alfian won the first two games 11-6, 11-6, to stun the Chinese Taipei favourites.

Their opponents responded, however, winning the next two 11-13, 11-9, to level the match.

It was the underdogs who would prevail though, narrowly clinching the title in the fifth and decisive game, 12-10.

In the men's singles event Malaysia's Daren Liew was forced to retire in the third game, handing the crown to Sourabh Varma of India.

Varma won the opening two games 12-10, 12-10 before Liew withdrew himself from the match when the score was tied 3-3 in the third game.

Elsewhere, there was a comfortable win in the women's doubles final for the number one seeds.

Japan's Yuki Fukushima and her partner Sayaka Hirota, the favourites for the title, made light work of compatriots Koharu Yonemoto and Shiho Tanaka, winning 12-10, 11-5, 11-7.

In the mixed doubles final, the only contest that featured two unseeded pairs, Hong Kong's Tang Chun Man and Tse Ying Suet prevailed.

Tang and Tse comfortably defeated Japan's Ryota Taohata and Koharu Yonemoto, 11-3, 11-7, 14-12.

At the BWF Dutch Open, another Grand Prix Gold event running simultaneously, Chinese Taipei's Tzu Wei Wang beat India's Ajay Jayaram in the men's singles final.

Wei, the second seed, got the better of the tournament favourite in three games, 21-10, 17-21, 21-18.

In the women's competition at the Topsportcentrum in Almere, the number one seed Beiwen Zhang of the United States defeated Chinese Taipei's Hsu Ya Ching 21-11, 21-19.