The reigning world champion and world number one will be a huge host nation hope for gold at next year's Olympics and was too strong in round two today for Thailand's Kantaphon Wangcharoen.

Momota, the top seed who became the first home winner of the men's event at the Japan Open last year, was forced to miss the Rio 2016 Olympics as he was serving a ban for illegal gambling.

He saw off Wangcharoen 21-12, 21-13 at the Musashino Forest Sports Plaza venue which will host Olympic competition next year.

With second seed Shi Yuqi of China and third seed Viktor Axelsen of Denmark both withdrawing from the tournament through injury, Chinese Taipei's fourth seed Chou Tien-chen was considered Momota's closest rival but was beaten in three games.

Chou, who won the Indonesia Open on Sunday (July 21), went down 21-19, 11-21, 21-19 to Denmark's Jan Ø. Jørgensen.

Indonesia enjoyed a strong day as three of their players made the next round.

Sixth seed Jonatan Christie, the Asian Games gold medallist, knocked out Hong Kong's Ng Ka Long 21-16, 21-15.

Anthony Sinisuka Ginting, the seventh seed, came from behind to defeat Thailand's Sitthikom Thammasin 20-22, 21-17, 21-6 while unseeded Tommy Sugiarto saw off Hong Kong's Wong Wing Ki 21-16, 21-17.

In the women's draw Japan celebrated both of their top players reaching the last eight.

Third seed and 2017 world champion Nozomi Okuhara came through against Denmark's Mia Blichfeldt, 21-11, 21-12.

Akane Yamaguchi, the fourth seed who won in Indonesia, defeated China's Chen Xiaoxin 21-15, 21-14.

Chinese Taipei's top seed and world number one Tai Tzu-ying won 21-18, 21-15 against Indonesia's Gregoria Mariska Tunjung while India's fifth seed PV Sindhu came from behind to end the hopes of Japan's Aya Ohori, 11-21, 21-10, 21-13.

China's second seed Chen Yufei is safely through after a 21-7, 21-16 win over Malaysia's Sonila Cheah.

The quarter-finals will take place tomorrow at an event rated at Super 750 on the BWF World Tour, the second highest level.

All of the Olympic test events are being held under the "Ready Steady Tokyo" banner with competitions in weightlifting, archery, surfing and road cycling having taken place so far.

The badminton will conclude on Sunday (July 28) with finals across the singles and doubles events. 

Back-to-back defending women's champion Carolina Marin, the reigning Olympic gold medallist, is not present after rupturing her cruciate ligament in January.