The Japanese top seed cruised to a straight sets win over home favourite Vu Thi Trang at the Nguyen Du Stadium in Ho Chi Minh City.

Takahashi silenced the Vietnamese crowd by beating Trang 21-9, 21-14 in just 34 minutes.

Khosit Phetpradab won an all-Thai final to be crowned men's singles champion.

The tournament's third seed overcame compatriot Suppanyu Avihingsanon 21-15, 21-19 in the first final of the day. 

There was further Thai success in the women's doubles competition as Chayanit Chaladchalam and partner Phataimas Muenwong beat Indonesia's Della Destiara Haris and Rizki Amelia Pradipta 21-16, 21-9.

That was the only mark against Indonesia's record on finals day as the Asian nation went on to claim both the men's and mixed doubles titles.

Wahyu Nayaka Arya Pangkaryanira and Ade Yusuf Santoso upset third seeds Liao Min Chun and Cheng Heng Su of Chinese Taipei to win the men's final.

Liao and Cheng took the opening set 21-12 but the Indonesians, seeded seventh, responded by winning the second and third 21-16, 23-21.

Alfian Eko Prasetya and Melati Daeva Oktavianti added the mixed crown to Indonesia's success when they defeated compatriots Riky Widianto and Masita Mahmudin 21-14, 21-14.