Koki Watanabe

Koki Watanabe
Watanabe at the 2026 Indonesia Open
Personal information
Born (1999-01-29) 29 January 1999 (age 27)
Koshigaya, Saitama, Japan
Height1.66 m (5 ft 5 in)
Weight65 kg (143 lb)
Sport
CountryJapan
SportBadminton
HandednessRight
Coached bySho Sasaki
Men's singles
Career record211 wins, 135 losses (60.98%)
Highest ranking11 (22 October 2024)
Current ranking15 (27 October 2026)
BWF profile
Medal record
Men's badminton
Representing  Japan
Sudirman Cup
Bronze medal – third place2025 XiamenMixed team
Asian Games
Bronze medal – third place2022 HangzhouMen's team
Asia Team Championships
Gold medal – first place2026 QingdaoMen's team
Bronze medal – third place2020 ManilaMen's team
Bronze medal – third place2024 SelangorMen's team
World Junior Championships
Bronze medal – third place2015 LimaBoys' singles
Bronze medal – third place2016 BilbaoMixed team
Asian Junior Championships
Bronze medal – third place2015 BangkokMixed team
Bronze medal – third place2016 BangkokMixed team

Koki Watanabe (渡邉 航貴, Watanabe Kōki; born 29 January 1999) is a Japanese badminton player. He graduated from the Saitama Sakae High School, and was part of the BIPROGY team since 2017. Watanabe won the Super 300 title at the 2023 Swiss Open and the Super 500 title at the 2024 Canada Open. He also finished runner-up at two Super 750 tournaments, the 2024 Denmark Open and the 2026 Japan Open.

In team competitions, Watanabe won a bronze medal with Japan in the men's team event at the 2022 Asian Games. He was also part of the Japanese squad that won the country's first men's team title at the 2026 Asia Team Championships.

Early life and junior career

Watanabe started his badminton career when he was four years old, entering the badminton club under the influence of his sister. He later concentrated on badminton in kindergarten, and when he was in elementary school, he won the Saitama school championships for three consecutive years. Watanabe entered the Saitama Sakae Junior and Senior High School, and won the singles title at the national junior championships, also placing third in the doubles event.

He competed with the national junior team at the 2015 and 2016 Asia and World Junior Championships. In 2015, he won a bronze medal in boys' singles and helped the team secure a mixed team bronze at the Asian Championships; he contributed to two additional team bronze medals at the 2016 Asian and World Junior Championships.

Career

2018–2019

In 2018, Watanabe reached his first World Tour final at the Super 100 Russian Open, finishing as the runner-up. Later that year, he won his first international title at the K & D Graphics International, defeating compatriot Kodai Naraoka in the final.

In 2019, Watanabe secured his maiden World Tour title at the Super 100 Orléans Masters, becoming the first Japanese player to win the tournament's men's singles title. He subsequently won the Osaka International defeating his schoolmate Takuma Obayashi in the final. Throughout the 2019 season, he advanced to the semi-finals of the Chinese Taipei Open and the Canada Open. At the end of the season, Watanabe was nominated for the Eddy Choong Most Promising Player of the Year award, which was won by An Se-young.

2020–2022

In 2020, Watanabe won a bronze medal with the Japanese men's team at the Asia Team Championships. After the international circuit resumed following the COVID-19 pandemic, he made his Super 1000 debut at the 2021 All England Open, where he lost in the first round to Viktor Axelsen. Later that year, he made his World Championships debut in Huelva, advancing to the second round. His best result of the 2022 season was a quarterfinal finish at the Australian Open.

2023–2024

In March, Watanabe won his first World Tour Super 300 title at the Swiss Open, becoming the first Japanese player to win the tournament's men's singles title. He defeated second seed Lee Zii Jia in the semi-finals and Chou Tien-chen in the final. In November, he reached his second final of the season at the Korea Masters, where he finished as the runner-up to compatriot Kento Momota.

Watanabe began 2024 by winning another men's team bronze medal at the Asia Team Championships. In July, he claimed his first Super 500 title at the Canada Open, defeating compatriot Kodai Naraoka the quarter-finals and Alex Lanier in the final. Later in the season, Watanabe advanced to his first Super 750 final at the Denmark Open, where he defeated Olympic silver medalist Kunlavut Vitidsarn before finishing as runner-up to Anders Antonsen.

His other results that season included semi-final appearances at the Arctic Open and the U.S. Open, as well as quarter-final finishes at the All England Open, China Open, and India Open. His notable victories during the season included a win over world number 3 Li Shifeng at the India Open and two wins against Olympic bronze medalist Lee Zii Jia at the China and Arctic Opens. Following these performances, Watanabe reached a career-high world ranking of 11 on 22 October.

2025

Watanabe experienced a challenging start to his 2025 season, suffering early-round exits in several tournaments, including the Super 1000 Malaysia Open and Indonesia Open. His form improved in July at the Super 750 Japan Open, where he reached the semifinals of the tournament for the first time. En route, he defeated Chou Tien-chen in the second round and Weng Hongyang in the quarter-finals. Watanabe credited advice from compatriot Kento Momota, which encouraged him to adopt a "challenger spirit" to overcome his slump. Later in the season, he reached the quarter-finals of the Arctic Open and French Open, although he was eliminated in the first round of both World Championships and China Open. In team competition, he won a bronze medal with Japanese team at the Sudirman Cup.

2026

In February, Watanabe was part of the Japanese squad that won Japan's first men's team title at the Asia Team Championships. In March, Watanabe competed at the All England Open, where he upset third seed Anders Antonsen in the opening round before being eliminated in the quarter-finals by Canada's Victor Lai. In April, Watanabe competed at the Asian Championships in Ningbo, China, defeating Zaki Ubaidillah in the first round before falling to Loh Kean Yew in the second round. In May, he reached the quarter-finals at the Thailand Open, where he defeated sixth seed Kodai Naraoka in the second round before losing to world No. 1 Shi Yuqi. Later that month, he reached the semi-finals of the Singapore Open. He defeated India's Lakshya Sen in the quarter-finals before losing to Loh Kean Yew.

In July, Watanabe reached his second Super 750 final at the Japan Open, defeating Antonsen in the quarter-finals and Yushi Tanaka in the semi-finals before finishing as runner-up to Christo Popov. In October, he reached the semi-finals of the Arctic Open, defeating Chou Tien-chen in the quarter-finals before losing to Tanaka in three games.

Awards and nominations

Award Year Category Result Ref.
BWF Awards 2019 Eddy Choong Most Promising Player of the Year Nominated

Achievements

World Junior Championships

Boys' singles
YearVenueOpponentScoreResultRef.
2015 Centro de Alto Rendimiento de la Videna,
Lima, Peru		 Chinese Taipei Lu Chia-hung 18–21, 12–21 Bronze Bronze

BWF World Tour (3 titles, 4 runners-up)

The BWF World Tour, which was announced on 19 March 2017 and implemented in 2018, is a series of elite badminton tournaments sanctioned by the Badminton World Federation (BWF). The BWF World Tour is divided into levels of World Tour Finals, Super 1000, Super 750, Super 500, Super 300, and the BWF Tour Super 100.

Men's singles
YearTournamentLevelOpponentScoreResultRef.
2018 Russian Open Super 100 India Sourabh Verma 21–18, 12–21, 17–21 2nd place, silver medalist(s) Runner-up
2019 Orléans Masters Super 100 France Thomas Rouxel 18–21, 21–12, 21–19 1st place, gold medalist(s) Winner
2023 Swiss Open Super 300 Chinese Taipei Chou Tien-chen 22–20, 18–21, 21–12 1st place, gold medalist(s) Winner
2023 Korea Masters Super 300 Japan Kento Momota 16–21, 15–21 2nd place, silver medalist(s) Runner-up
2024 Canada Open Super 500 France Alex Lanier 20–22, 21–17, 21–6 1st place, gold medalist(s) Winner
2024 Denmark Open Super 750 Denmark Anders Antonsen 15–21, 16–21 2nd place, silver medalist(s) Runner-up
2026 Japan Open Super 750 France Christo Popov 11–21, 19–21 2nd place, silver medalist(s) Runner-up

BWF International Challenge/Series (2 titles)

Men's singles
YearTournamentOpponentScoreResultRef.
2018 Yonex / K&D Graphics International Japan Kodai Naraoka 21–14, 14–21, 21–15 1st place, gold medalist(s) Winner
2019 Osaka International Japan Takuma Obayashi 19–21, 21–17, 21–7 1st place, gold medalist(s) Winner

  BWF International Challenge tournament

BWF Junior International (1 title, 1 runner-up)

Boys' singles
YearTournamentOpponentScoreResultRef.
2015 Danish Junior Cup Japan Yuta Watanabe 21–12, 18–21, 7–21 2nd place, silver medalist(s) Runner-up
Boys' doubles
YearTournamentPartnerOpponentScoreResultRef.
2015 Australian Junior International Japan Kenya Mitsuhashi Philippines Christian Bernardo
Philippines Alvin Morada		 16–21, 21–17, 21–16 1st place, gold medalist(s) Winner

  BWF Junior International Series tournament
  BWF Junior Future Series tournament

Performance timeline

Key
W Won F Finalist SF Semi-finalist
QF Quarter-finalist #R Rounds 4, 3, 2, 1 RR Round-robin stage
Q# Qualification round A Absent w/d Withdrew
G Gold S Silver B Bronze
NH Not held N/A Not applicable DNQ Did not qualify

National team

  • Junior level
Team events20152016Ref.
Asian Junior Championships B B
World Junior Championships 4th B
  • Senior level
Team events2020202120222023202420252026Ref.
Asia Mixed Team Championships NH 6th NH A NH
Asia Team Championships B NH A NH B NH G
Asian Games NH B NH 5th
Sudirman Cup NH A NH A NH B NH
Thomas Cup A NH A NH 5th NH 5th

Individual competitions

  • Junior level
Events20152016Ref.
Asian Junior Championships A 4R
World Junior Championships B QF
  • Senior level
Event202120222023202420252026Ref.
Asian Championships NH 2R A 1R 1R 2R
World Championships 2R A A NH 1R A
TournamentSS / GPBWF World TourBestRef.
201520162017201820192020202120222023202420252026
Malaysia Open A A NH A 2R 2R 2R 2R ('24, '25, '26)
India Open A A NH A QF 1R 1R QF ('24)
Indonesia Masters A NH A Q2 2R A Q1 A 1R 2R ('21)
Thailand Masters NH A 3R A 2R 2R NH 2R A 3R ('17)
All England Open A A 1R A QF A QF QF ('24, '26)
Orléans Masters N/A A W NH A 2R A W ('19)
Swiss Open A 2R QF Q2 NH A 1R W 1R A QF W ('23)
Spain Masters NH A NH QF A NH QF ('23)
Thailand Open A A NH 2R A 2R A QF QF ('26)
Malaysia Masters A A 1R NH 1R A 1R A 1R 1R ('20, '22, '24, '26)
Singapore Open A A NH 2R A 1R SF SF ('26)
Indonesia Open A A NH 1R A 1R 2R 2R ('26)
Australian Open A 1R Q1 NH QF A 1R A QF ('22)
Macau Open A 3R 1R A NH A 3R ('17)
U.S. Open A QF A 2R NH A SF A SF ('24)
Canada Open A QF A SF NH A QF W A W ('24)
Japan Open A Q2 A NH A QF 1R SF F F ('26)
China Open A A NH A QF 1R 1R QF ('24)
Taipei Open A A SF NH 2R A SF ('19)
Korea Masters A 2R A A QF NH A F A F ('23)
China Masters A 1R A A NH 1R 1R 1R 1R 1R ('16, '23, '24, '25, '26)
Indonesia Masters Super 100 NH A NH 3R 3R A 3R ('22, '23)
A
Vietnam Open A 3R A A 3R NH A QF A QF ('23)
Arctic Open N/A N/A NH QF SF QF SF SF ('24, '26)
Denmark Open A A 2R F 1R 2R F ('24)
French Open A A NH A 1R 1R QF 2R QF ('25)
Hylo Open A A 1R A 1R ('21)
Korea Open A A NH 1R 2R A 2R 1R 2R ('23, '25)
Japan Masters NH NH QF 2R 1R Q QF ('23)
Hong Kong Open A A NH A 2R Q 2R ('25)
Akita Masters NH A QF NH QF ('19)
Chinese Taipei Masters A 2R NH NH 2R ('16)
New Zealand Open A 2R Q1 NH 2R ('18)
Russian Open A F A NH F ('18)
U.S. Grand Prix 3R N/A N/A 3R ('15)
Year-end ranking 377 165 77 81 42 37 43 46 23 11 25 11
Tournament201520162017201820192020202120222023202420252026BestRef.

Wins over top-10 ranked players

Wins over players who were ranked in the world's top 10 at the time the match was played.

# Opponent Rk Tournament Rd Score Rk Ref.
1 Malaysia Lee Zii Jia 4 2023 Swiss Open SF 21–11, 21–14 37
2 Chinese Taipei Chou Tien-chen 6 2023 Swiss Open F 22–20, 18–21, 21–12 37
3 China Li Shifeng 3 2024 India Open 2R 21–14, 13–21, 21–9 24
4 Japan Kodai Naraoka 6 2024 Canada Open QF 21–18, 16–21, 21–11 18
5 Malaysia Lee Zii Jia 3 2024 China Open 1R 21–15, 21–2 15
6 Malaysia Lee Zii Jia 4 2024 Arctic Open QF 21–15, 13–21, 21–12 14
7 Thailand Kunlavut Vitidsarn 6 2024 Denmark Open 2R 21–17, 21–19 13
8 Chinese Taipei Chou Tien-chen 7 2025 Sudirman Cup QF 21–13, 20–22, 21–14 16
9 Chinese Taipei Chou Tien-chen 6 2025 Japan Open 2R 16–21, 24–22, 21–17 18
10 Denmark Anders Antonsen 3 2026 All England Open 1R 21–8, 21–12 24
11 Japan Kodai Naraoka 9 2026 Thailand Open 2R 21–14, 14–21, 21–15 21
12 Denmark Anders Antonsen 3 2026 Japan Open QF 21–13, 21–17 17
13 Chinese Taipei Chou Tien-chen 3 2026 Arctic Open QF 21–19, 21–16 16
14 Chinese Taipei Chou Tien-chen 5 2026 Japan Masters 2R 24–22, 21–19 15

Record against selected opponents

Record against year-end Finals finalists, World Championships semi-finalists, and Olympic quarter-finalists. Accurate as of 18 October 2026.

Player Matches Win Lost Diff.
Canada Victor Lai 202–2
China Lin Dan 101–1
China Shi Yuqi 303–3
China Zhao Junpeng 303–3
Chinese Taipei Chou Tien-chen 8440
Denmark Anders Antonsen 725–3
Denmark Viktor Axelsen 404–4
Denmark Hans-Kristian Vittinghus 110+1
England Rajiv Ouseph 220+2
France Alex Lanier 523–1
France Christo Popov 514–3
Guatemala Kevin Cordón 110+1
Player Matches Win Lost Diff.
India Srikanth Kidambi 202–2
India Parupalli Kashyap 220+2
India Prannoy H. S. 2110
India Lakshya Sen 734–1
Japan Kento Momota 312–1
Japan Kodai Naraoka 734–1
Malaysia Lee Zii Jia 431+2
Malaysia Liew Daren 312–1
Singapore Loh Kean Yew 6330
South Korea Heo Kwang-hee 4220
Thailand Kunlavut Vitidsarn 725–3
Thailand Kantaphon Wangcharoen 220+2

References

  1. ↑ "Players: Koki Watanabe". Badminton World Federation. Retrieved 11 January 2019.
  2. 1 2 "Koki WATANABE | Profile". BIPROGY (in Japanese). Retrieved 13 December 2025.
  3. ↑ "WATANABE Koki – The 19th Asian Games". Olympic Council of Asia. Retrieved 11 October 2026.
  4. 1 2 もらった応援をうまく力に変えて、東京オリンピック出場を目指します！ (in Japanese). Koshigaya City. 14 June 2016. Retrieved 14 January 2019.
  5. 1 2 日本選手は準決勝敗退。銅メダル６個！ 世界ジュニア2015《個人戦》５日目結果 (in Japanese). Badminton Spirit. 7 November 2015. Retrieved 14 January 2019.
  6. 1 2 3 "Sourabh Verma wins Russian Open badminton, beats Koki Watanabe in final". Hindustan Times. 29 July 2018. Retrieved 19 September 2024.
  7. 1 2 "Pan Am Players at Yonex K&D Graphics International Challenge". Badminton Pan America. 24 December 2018. Retrieved 25 August 2024.
  8. 1 2 3 Anastasiadou-Galva, Despoina (24 March 2019). "Très Bien for Europe in Orléans!". Badminton Europe. Archived from the original on 19 September 2024. Retrieved 7 July 2025.
  9. 1 2 Komiya, Miyuki (8 April 2019). "OSAKA INT'L 2019 – Japan leaves 2 titles for Korea, takes the rest". Badzine. Archived from the original on 12 May 2025. Retrieved 15 July 2025.
  10. 1 2 "Nominees Announced for Player of the Year Awards". Badminton World Federation. 5 December 2019.
  11. ↑ "(BWF World Tour Finals 2019) Gelar Pemain Terbaik Kevin/Marcus 'Direbut' Kento Momota". PBSI (in Indonesian). 9 December 2019.
  12. 1 2 "Malaysian shuttlers beat Japan to reach Asia Team final". New Straits Times. 15 February 2020. Retrieved 14 December 2025.
  13. ↑ Sukumar, Dev (24 March 2021). "Review: Triumph in the Face of Challenges". Badminton World Federation. Archived from the original on 12 November 2024. Retrieved 13 December 2025.
  14. 1 2 "Zhao Jun beats Koki Watanabe". International Olympic Committee. 14 December 2021. Archived from the original on 16 August 2024. Retrieved 13 December 2025.
  15. 1 2 3 4 5 Binner, Andrew (26 March 2023). "Watanabe Koki wins shock Swiss Open badminton men's singles title". International Olympic Committee. Archived from the original on 27 October 2025. Retrieved 27 October 2025.
  16. 1 2 3 "Korea Masters: Momota breaks dry spell". Badminton World Federation. 12 November 2023. Retrieved 25 August 2024.
  17. 1 2 Kano, Shintaro (17 February 2024). "Badminton Asia Team Championships 2024: Lee Zii Jia helps Malaysia into final; Japan knocked out of men's and women's events". International Olympic Committee. Archived from the original on 17 February 2024. Retrieved 20 July 2025.
  18. ↑ "[Canada Open 2024] Koki Watanabe wins his first Super 500 title! Nakanishi and Iwanaga win their fourth title of the season!" (in Japanese). Badminton Spirit. 8 July 2024. Retrieved 3 January 2025.
  19. 1 2 3 4 Sukumar, Dev (8 July 2024). "Canada Open: 'dream Come True'". Badminton World Federation. Retrieved 20 October 2024.
  20. 1 2 3 Schwager-Patel, Nischal (20 October 2024). "BWF Denmark Open 2024: Home hero Anders Antonsen and Wang Zhi Yi seal badminton titles in style". International Olympic Committee. Retrieved 20 October 2024.
  21. 1 2 Pierre, Dianne (21 October 2024). "Denmark Open: Kasper On Board, Anders Makes Spirited Beginning". Badminton World Federation. Retrieved 21 October 2024.
  22. 1 2 Pierre, Dianne (18 October 2024). "Denmark Open: 'I Hope He's Okay'". Badminton World Federation. Archived from the original on 11 November 2024. Retrieved 20 July 2025.
  23. 1 2 de Villiers, Ockert (13 October 2024). "BWF Arctic Open 2024: Chou Tien-Chen sets up men's singles final clash against Jonatan Christie". International Olympic Committee. Archived from the original on 14 October 2024. Retrieved 20 July 2025.
  24. 1 2 "VICTOR China Open 2024". Orléans Masters Badminton. 7 October 2024. Archived from the original on 14 November 2024. Retrieved 20 July 2025.
  25. 1 2 Sukumar, Dev (15 March 2024). "All England: Christo Popov Sets French Milestone". Badminton World Federation. Archived from the original on 12 October 2024. Retrieved 20 July 2025.
  26. 1 2 Mookherjee, Tanmoy (18 January 2024). "India Open: Busanan Shocks Yamaguchi". Badminton World Federation. Archived from the original on 29 February 2024. Retrieved 20 July 2025.
  27. 1 2 Kano, Shintaro (17 September 2024). "BWF China Open 2024: Lee Zii Jia crashes out in first round - and fast". International Olympic Committee. Archived from the original on 13 October 2024. Retrieved 20 July 2025.
  28. 1 2 "Arctic Open: Watanabe Ends Lee's Reign". Badminton World Federation. 12 October 2024. Archived from the original on 4 November 2024. Retrieved 20 July 2025.
  29. ↑ "Badminton Malaysia Open 2025: Updates, Japanese Team Results, and Summary". International Olympic Committee (in Japanese). 6 January 2025. Archived from the original on 23 April 2026. Retrieved 23 April 2026.
  30. ↑ "Badminton Indonesia Open 2025: Updates, Japanese Team Results, and Summary". International Olympic Committee (in Japanese). 2 June 2025. Archived from the original on 23 April 2026. Retrieved 23 April 2026.
  31. 1 2 "[Badminton] Koki Watanabe comes from behind to beat world No. 6 in the second round of the Japan Open men's singles". Sports Nippon (in Japanese). 17 July 2025. Archived from the original on 21 July 2025. Retrieved 21 July 2025.
  32. ↑ Raftery, Alan (19 July 2025). "Lanier eyeing Japan Open repeat". Badminton Europe. Archived from the original on 21 July 2025. Retrieved 21 July 2025.
  33. ↑ Kubo, Marina (18 July 2025). "Japan's third-ranked player, Koki Watanabe, advances to the semi-finals after receiving advice from Kento Momota at the Badminton Japan Open". Sankei Shimbun (in Japanese). Retrieved 21 July 2025.
  34. ↑ "[Japan Open 2025] Koki Watanabe: "Yesterday's tough match had a positive effect. I'm making fewer unnecessary movements." (Quarter-finalist Player Comment #4)". Badminton Spirit (in Japanese). 18 July 2025. Archived from the original on 21 July 2025. Retrieved 21 July 2025.
  35. ↑ Sukumar, Dev (26 August 2025). "Day to Savour for Azerbaijan". Badminton World Federation. Archived from the original on 13 December 2025. Retrieved 13 December 2025.
  36. 1 2 "Defending champions China power past Japan to reach Sudirman Cup final". New Straits Times. 3 May 2025. Archived from the original on 21 July 2025. Retrieved 21 July 2025.
  37. 1 2 "Badminton Asia Team: Maiden Title for Korea, Japan". Badminton World Federation. 8 February 2026. Archived from the original on 9 February 2026. Retrieved 9 February 2026.
  38. 1 2 "Shi Yu Qi knocked out on Day 1 of the YONEX All England 2026". Badminton England. 4 March 2026. Archived from the original on 15 April 2026. Retrieved 15 April 2026.
  39. 1 2 "All England: Canada, France Celebrate Milestones". Badminton World Federation. 7 March 2026. Archived from the original on 11 March 2026. Retrieved 15 April 2026.
  40. ↑ "Asian Badminton Championships 2026: Updates, Japanese Team Results, and Summary". International Olympic Committee (in Japanese). 11 April 2026. Archived from the original on 15 April 2026. Retrieved 15 April 2026.
  41. ↑ Kano, Shintaro (9 April 2026). "Badminton Asia Championships 2026: Loh Kean Yew survives Watanabe Koki challenge, moves into last eight". International Olympic Committee. Archived from the original on 15 April 2026. Retrieved 15 April 2026.
  42. 1 2 Sukumar, Dev (14 May 2026). "Thailand Open: Despite Injury, Intanon Serves a Treat". Badminton World Federation. Archived from the original on 17 May 2026. Retrieved 17 May 2026.
  43. 1 2 "Pitchamon keeps Thai hopes alive, Ratchanok falls". Bangkok Post. 16 May 2026. Archived from the original on 16 May 2026. Retrieved 16 May 2026.
  44. 1 2 Lee, David (31 May 2026). "Loh Kean Yew reaches Singapore Badminton Open final for the first time". The Straits Times. Archived from the original on 9 June 2026. Retrieved 9 June 2026.
  45. 1 2 Sukumar, Dev (17 July 2026). "Japan Open: Yamaguchi Leads Home Surge". Badminton World Federation. Retrieved 27 August 2026.
  46. ↑ "Japan Open 2026: Koki Watanabe and Akane Yamaguchi Advance to Finals; Watanabe Eyes First Title, Yamaguchi Fifth (Semifinal Results)". Badminton Spirit (in Japanese). 18 July 2026.
  47. 1 2 3 "BWF Japan Open 2026: PV Sindhu ends long title drought while Christo Popov victorious in men's singles". Olympics. 19 July 2026. Retrieved 19 July 2026.
  48. 1 2 "Chou Tien-chen loses to Koki Watanabe in Arctic Open quarterfinals, misses third consecutive title". Central News Agency (in Chinese). 9 October 2026. Retrieved 10 October 2026.
  49. 1 2 "Arctic Open 2026 (Super 500) Semifinals: Tanaka Defeats Watanabe to Reach Men's Singles Final; Okuhara Finishes in Women's Singles Semifinals". SMASH and NET. TV (in Japanese). 10 October 2026.
  50. ↑ Alleyne, Gayle (14 November 2015). "Historic Singles Finals – Day 5: YONEX BWF World Junior Championships 2015". Badminton World Federation. Retrieved 19 April 2025.
  51. ↑ Alleyne, Gayle (19 March 2017). "BWF Launches New Events Structure". Badminton World Federation. Archived from the original on 1 December 2017. Retrieved 29 November 2017.
  52. ↑ Sukumar, Dev (10 January 2018). "Action-Packed Season Ahead!". Badminton World Federation. Archived from the original on 13 January 2018. Retrieved 15 January 2018.
  53. ↑ "Swiss Open: Koki Watanabe Emerges Surprise Winner". Badminton World Federation. 27 March 2023. Retrieved 25 August 2024.
  54. ↑ "Result: 2018 Yonex/K&D Graphics International Challenge" (in Japanese). Nippon Badminton Association. Retrieved 19 April 2025.
  55. ↑ "[Osaka International Challenge] Japanese athletes win in three events! Watanabe, Kawakami, Hobara and Sone become champions!" (in Japanese). Badminton Spirit. 8 April 2019. Retrieved 25 August 2024.
  56. ↑ Akashi, Noriko (12 October 2015). "Badminton Danish Junior 2015 | Reports". Nippon Badminton Association (in Japanese). Archived from the original on 21 March 2016. Retrieved 9 April 2026.
  57. ↑ "Pinoy shuttlers bag 2 golds in Aussie jrs". The Philippine Star. 27 September 2015. Retrieved 10 November 2026.
  58. ↑ "Japan wins bronze at Asian Junior U19 Championships team event". Badminton Spirit (in Japanese). 1 July 2015. Retrieved 10 November 2026.
  59. ↑ "It is China – Korea mixed team team final again in Asian Junior Championships". Badminton Asia. 11 July 2016. Retrieved 10 November 2026.
  60. ↑ "2015 World Juniors: Japan finishes fourth in team event". SMASH and NET.TV (in Japanese). 9 November 2015. Retrieved 10 November 2026.
  61. ↑ "World Juniors: Japan's young prospects return home – post-tournament comments". Badminton Spirit (in Japanese). 16 November 2016. Retrieved 10 November 2026.
  62. ↑ "Day 4: Korea and Thailand's Surprise to the Semifinal". Badminton Asia. 18 February 2023. Retrieved 10 November 2026.
  63. ↑ "Japan's men's badminton team takes bronze after losing to China, misses first Asian Games final in 65 years". TBS NEWS DIG (in Japanese). 30 September 2023. Retrieved 10 November 2026.
  64. ↑ "Asian Games: Lakshya Sen delivers as India men's team secures back-to-back medals". India Today. 22 September 2026. Retrieved 10 November 2026.
  65. ↑ Larsson, Henry (2 May 2024). "Thomas Cup: Malaysia advance to semis after Japan mauling, to face China". Stadium Astro. Retrieved 10 November 2026.
  66. ↑ "Bleu Brilliance: France Make History". Badminton World Federation. 2 May 2026. Archived from the original on 3 May 2026. Retrieved 10 November 2026.
  67. ↑ "Asian Junior Championships 2016: Nidaira reaches singles quarter-finals". Badminton Spirit (in Japanese). 16 July 2016. Retrieved 10 November 2026.
  68. ↑ "World Juniors: Oie and Hobara/Matsuyama advance to semi-finals". Badminton Spirit (in Japanese). 12 November 2016. Retrieved 10 November 2026.
  69. ↑ "Asian Championships 2022: Three Japanese women's doubles pairs advance to quarter-finals". Badminton Spirit (in Japanese). 28 April 2022. Retrieved 10 November 2026.
  70. ↑ "Asian Championships 2024: Koki Watanabe reflects on his first-round defeat". Badminton Spirit (in Japanese). 11 April 2024. Retrieved 10 November 2026.
  71. ↑ "Jojo, Shi off to winning start in Ningbo". Badminton Asia. 9 April 2025. Retrieved 10 November 2026.
  72. ↑ Lee, David (10 April 2026). "S'pore's Loh Kean Yew loses to Chou Tien-chen in Badminton Asia C'ships q-finals". The Straits Times. Retrieved 10 November 2026.
  73. ↑ Hansen, Anders (26 August 2025). "Major upset as Ade Resky knocks out Koki Watanabe". Badminton Europe. Retrieved 10 November 2026.
  74. ↑ Salim, Faizal (8 January 2026). "Three pairs keep Malaysia in the hunt at Malaysia Open". New Straits Times. Retrieved 9 November 2026.
  75. ↑ "Kunlavut keeps run going with 3-game win in India". Bangkok Post. 15 January 2026. Retrieved 9 November 2026.
  76. ↑ "Indonesia Masters 2026: PV Sindhu, Kidambi Srikanth Storm Into Pre-Quarters". News18. 21 January 2026. Retrieved 9 November 2026.
  77. ↑ 陳曉莉 (3 February 2023). "Ng Ka Long and Lee Cheuk Yiu advance to Thailand Masters quarter-finals". Wen Wei Po (in Traditional Chinese). Retrieved 9 November 2026.
  78. ↑ "Madrid Spain Masters 2023: Antonsen stays on track". Badzine (in German). 1 April 2023. Retrieved 9 November 2026.
  79. ↑ Aktor, Lukas (20 May 2026). "Popov brothers split fortunes at the PERODUA Malaysia Masters 2026". Badminton Europe. Retrieved 9 November 2026.
  80. ↑ "Victor Lai Makes History Winning POLYTRON Indonesia Open 2026". Badminton Canada. 7 June 2026. Retrieved 9 November 2026.
  81. ↑ Aditama, Oryza (18 November 2022). "Australian Open 2022 Results and List of Semi-finalists". Tirto.id (in Indonesian). Retrieved 9 November 2026.
  82. ↑ "Wei Feng continues fine run at Macau Open". Malay Mail. Bernama. 9 November 2017. Retrieved 9 November 2026.
  83. ↑ "US Open Day 5: Lei Lanxi advances to final to face Yushi Tanaka". Sina Sports (in Simplified Chinese). 30 June 2024. Retrieved 9 November 2026.
  84. ↑ "Panitchaphon keeps Thai hopes alive". Bangkok Post. 23 July 2026. Retrieved 9 November 2026.
  85. ↑ 陳容琛 (7 September 2019). "Will the final be against Chou Tien-chen? Heo Kwang-hee praises him as very smart". TSNA (in Chinese (Taiwan)). Retrieved 10 November 2026.
  86. ↑ 吳慕兒 (1 September 2026). "Badminton: Jason Gunawan defeats Koki Watanabe to reach last 16 at China Masters; women's doubles pair eliminated". Hong Kong 01 (in Traditional Chinese). Retrieved 9 November 2026.
  87. ↑ Pane, Anwar S (7 September 2023). "BNI Indonesia Masters 2023: Okuhara reaches quarter-finals, Watanabe eliminated by Malaysian player". Mistar.id (in Indonesian). Retrieved 10 November 2026.
  88. ↑ Masuda, Keita (15 September 2023). "Vietnam Open 2023". Badminton Association of Japan (in Japanese). Retrieved 10 November 2026.
  89. ↑ Chen, Rong-chen (15 October 2026). "Chou Tien-chen Avenges Loss with Straight-Games Win over Japanese Opponent to Reach Denmark Open Quarterfinals". Central News Agency (in Chinese (Taiwan)). Retrieved 16 October 2026.
  90. ↑ "French Open: Unheralded Challengers Shine". Badminton World Federation. 23 October 2026. Retrieved 23 October 2026.
  91. ↑ "Kidambi Srikanth sails into HYLO Open second round". The Times of India. Press Trust of India. 3 November 2021. Retrieved 9 November 2026.
  92. ↑ "Ng Ka Long and Jason Gunawan advance to second round after three-game battles at Korea Open". Now Sports (in Traditional Chinese). 4 November 2026. Retrieved 9 November 2026.
  93. ↑ 黎建忠 (17 November 2023). "Chou Tien-chen scores 11 straight points to defeat opponent and reach Kumamoto Masters semi-finals". Central News Agency (in Chinese (Taiwan)). Retrieved 10 November 2026.
  94. ↑ 刘欢; 甄晓博 (12 September 2025). "Hong Kong Open: Top-seeded women's doubles pair Liu Shengshu and Tan Ning miss out on quarter-finals". Xinhuanet (in Chinese). Xinhua News Agency. Retrieved 10 November 2026.
  95. ↑ "Akita Masters: Japanese players advance to semi-finals in all five events". Badminton Spirit (in Japanese). 16 August 2019. Retrieved 10 November 2026.
  96. ↑ Nakanishi, Yosuke (12 October 2016). "Chinese Taipei Masters 2016". Japan Badminton Association (in Japanese). Retrieved 10 November 2026.
  97. ↑ Nurmansyah, Rizki (4 May 2018). "All-Indonesian clash at New Zealand Open: Jonatan wary of facing Tommy". Suara.com (in Indonesian). Retrieved 10 November 2026.
  98. ↑ "Pablo Abián reaches quarter-finals of the US Grand Prix". Huelva24.com (in Spanish). 10 December 2015. Retrieved 10 November 2026.
  99. ↑ "China and Japan cruise into Sudirman Cup semi-finals". Reuters. 2 May 2025. Retrieved 27 August 2026.
  100. ↑ Chen, Rong-chen (12 November 2026). "BWF Kumamoto Masters: Chou Tien-chen Loses to Japanese Player, Misses Quarterfinals". Central News Agency (in Chinese (Taiwan)). Retrieved 12 November 2026.
  101. ↑ "Koki WATANABE – Head To Head". Badminton World Federation. Retrieved 18 October 2026.