Kento Momota, only restored to the national team in January after a suspension for illegal gambling, became the first Japanese man to win a badminton singles world championship on Sunday.

Earlier, Mayu Matsumoto and Wakana Nagahara came from behind to win an all-Japanese women's doubles championship, defeating compatriots Yuki Fukushima and Sayaka Hirota. Japan completed a record six-medal haul with Takeshi Kamura and Keigo Sonoda settling for silver in the men's doubles final.

The 23-year-old Momota, the first Japanese to medal in singles at the badminton worlds when he won a bronze in 2015, missed the 2016 Olympics due to a suspension for gambling at a casino, which are illegal in Japan.

The sixth-seeded Momota defeated Chinese third seed Shi Yuqi 21-11, 21-13 to give Japan its second gold of this year's worlds.

"My legs moved well, and on top of that I was able to return his best shots and that put him under pressure," Momota said.

"This championship could not have been won by myself alone. The basis of my victory was a feeling of gratitude."

In the women's doubles final, Matsumoto and Nagahara beat the second seeds for the first time in international competition, winning 19-21, 21-19, 22-20. The new champs, both 22 years old, never had a lead in the final game until they reached match point at 21-20.

"I wanted to go out with us playing our best right to the end," Nagahara said. "We were able to turn things around and play for all we were worth."

"For the first time ever, winning brought tears to my eyes."

It was Japan's first world championship in women's doubles in 41 years. In 1977, Etsuko Toganoo and Emiko Ueno took gold in the inaugural worlds. Both Nagahara and Matsumoto were competing at the worlds for the first time.

"Because this is a rare view from the top spot (on the podium) I really savored it," Matsumoto said. "The two of us came here to our first worlds with a strong desire to just enjoy it as much as we could."

Japanese fifth seeds 2017 bronze medalists Kamura and Sonoda lost 21-12, 21-19 to Chinese fourth seeds Li Junhui and Liu Yuchen in the men's doubles final.

In an all-Chinese mixed doubles final, top seeds Zheng Siwei and Huang Yaqiong defeated second seeds Wang Yilyu and Huang Dongping 21-17, 21-19.

Spanish seventh seed Carolina Marin beat India's V. Sindhu Pusarla, the 2016 Olympic silver medalist, to win the women's singles crown 21-19, 21-10.

The world championships wrap up when Japanese fifth seeds and 2017 bronze medalists Takeshi Kamura and Keigo Sonoda play Chinese fourth seeds Li Junhui and Liu Yuchen for the men's doubles championship.