Japan's Kento Momota and Akane Yamaguchi clinched the respective men's and women's singles titles as action concluded today at the Badminton World Federation (BWF) German Open in Mülheim.
World champion Momota beat compatriot Kenta Nishimoto 21-10, 21-16 in the men's final at the Innogy Sporthalle.
It came after Yamaguchi had come from behind and survived a championship point on her way to defeating Thailand's Ratchanok Intanon 16-21, 21-14, 25-23 in the women's final.
Victory for Yamaguchi secures her an unprecedented third consecutive title at the event.
Japan also had success today in the men's doubles final after second seeds Hiroyuki Endo and Yuta Watanabe overcame top-seeded countrymen Takeshi Kamura and Keigo Sonoda 15-21, 21-11, 21-12.
Their was disappointment for the nation in the women's doubles final, however, as second seeds Misaki Matsutomo and Ayaka Takahashi lost to eighth seeds Du Yue and Li Yinhui of China, 20-22, 15-21.
Eighth seeds Seo Seung Jae and Chae YuJung of South Korea were crowned the mixed doubles champions after beating sixth seeds Hafiz Faizal and Gloria Emanuelle Widjaja of Indonesia 21-17, 21-11.
The BWF World Tour event is ranked as a Super 300, offering prize money of $150,000 (£114,000/€132,000).