Riko Gunji

Riko Gunji
Gunji at the 2023 Kaohsiung Masters
Personal information
Native name
郡司 莉子
Born (2002-07-31) 31 July 2002 (age 24)
Ebina, Kanagawa, Japan
Height1.60 m (5 ft 3 in)
Sport
CountryJapan
SportBadminton
HandednessRight
Coached byTakako Ida
Tatsuya Watanabe
Women's singles
Career record202 wins, 64 losses (75.94%)
Highest ranking18 (2 June 2026)
Current ranking20 (27 October 2026)
BWF profile
Medal record
Women's badminton
Representing  Japan
Uber Cup
Bronze medal – third place2022 BangkokWomen's team
Bronze medal – third place2026 HorsensWomen's team
Asian Games
Silver medal – second place2026 Aichi–NagoyaWomen's team
Asia Team Championships
Gold medal – first place2020 ManilaWomen's team
Bronze medal – third place2022 SelangorWomen's team
World Junior Championships
Gold medal – first place2019 KazanGirls' singles
Bronze medal – third place2018 MarkhamMixed team
Bronze medal – third place2019 KazanMixed team
Asian Junior Championships
Silver medal – second place2018 JakartaMixed team

Riko Gunji (郡司 莉子, Gunji Riko; born 31 July 2002) is a Japanese badminton player who competes in women's singles. A member of the Japanese national team, she plays for the Kumamoto Saishunkan team and has reached a career-high world ranking of No. 18. She is the gold medalist at the 2019 BWF World Junior Championships in the girls' singles. She secured her maiden BWF World Tour title at the 2024 Indonesia Masters Super 100 and won her first Super 300 title at the 2026 Canada Open. In team competitions, she was a member of the Japanese squad that won gold at the 2020 Asia Team Championships and earned bronze medals at the 2022 and 2026 Uber Cup.

Career

Gunji was the finalist in the Under-15 at the 2016 Singapore Youth International Series. In the same tournament, she won the girls' doubles title with partner Akari Nakashizu. She was the girls' singles Under-17 champion of 2017 Singapore Youth International Series beating Peeraya Khantaruangsakul of Thailand. She won the bronze medal in 2018 BWF World Junior Championships mixed team event. In the girls' singles, she lost in the second round to China's Wang Zhiyi.

In 2019, she reached the final of Dutch Junior International where she earned second best position after losing to China's Han Qianxi. She lost another final at the India Junior International event to Thai player Benyapa Aimsaard. In 2019 World Junior Championships, she entered the tournament seeded 7th. She went on to stun several higher seeded players in the tournament. She defeated Thailand's Phittayaporn Chaiwan in semifinal, who was a top seeded player in 2 straight games. In the final she won the World Junior title, beating out China's Zhou Meng.

2020–2022

Moving to senior competition, Gunji was part of the Japanese women's team that won gold at the 2020 Asia Team Championships. In 2021, she secured her first senior international title at the Belgian International. The 2022 season saw Gunji win three more International Challenge titles at the Mexican International, Réunion Open, and Irish Open, while finishing as runner-up at the Indonesia International and Norwegian International. She also reached her first BWF World Tour final at the 2022 Indonesia Masters Super 100, finishing in second place. In team events, she contributed to Japan's bronze medals at both the 2022 Asia Team Championships and the Uber Cup.

2023

Gunji began the 2023 season by reaching the second round of the Thailand Masters. She then competed in Europe, exiting in the first round of the German Open by then-world No. 2 An Se-young and advanced to the second round of the Swiss Open. At the Spain Masters, she retired from her opening match after sustaining a right hamstring muscle tear. This injury required a six-month break, causing her world ranking to fall from the 30s to over 100. She returned to competition in September, reaching the quarterfinals of the Super 100 Indonesia Masters and finishing as the runner-up at the Super 100 Kaohsiung Masters. In late October, Gunji suffered a second injury: a sprained right ankle with partial tears to two ligaments.

2024–2025

In 2024, Gunji won her first BWF World Tour title at the Indonesia Masters Super 100, defeating compatriot Hina Akechi in the final. On the International Challenge circuit, she won four titles: the Thailand International, Denmark Challenge, Saipan International, and Malaysia International. Additionally, she was the runner-up at the Luxembourg Open.

In 2025, Gunji began competing in higher-tier World Tour events. She reached the semifinals of the German Open, followed by quarterfinal finishes at the Orléans Masters and the Taipei Open. In July, she reached her first Super 750 semifinal at the Japan Open, defeating fourth seed Han Yue in the quarterfinals before losing to world No. 1 An Se-young. Later that year, Gunji made her Super 1000 debut at the China Open, where she was eliminated in the second round by eventual champion Wang Zhiyi.

2026

Gunji began her 2026 season in January with first-round exits at two consecutive tournaments, the Malaysia Open and the India Open. In February, she represented Japan at the Asia Team Championships, where the women's team finished fifth. During the European tour in March, Gunji advanced to the second round of the All England Open and reached the quarterfinals of both the Swiss Open and the Orléans Masters. Making her debut at the Asian Championships in April, she defeated Kim Ga-eun in the second round before falling to Wang Zhiyi in the quarterfinals. In May, Gunji contributed to Japan's bronze medal finish at the Uber Cup in Horsens. In July, Gunji won her first Super 300 title at the Canada Open. She defeated home favorite Michelle Li in the semifinals before overcoming Denmark's Line Christophersen in the final. She made her World Championships debut in August, where she was eliminated in the first round.

Achievements

World Junior Championships

Girls' singles

Year Venue Opponent Score Result Ref
2019 Kazan Gymnastics Center, Kazan, Russia China Zhou Meng 21–13, 12–21, 21–14 Gold Gold

BWF World Tour (2 titles, 2 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 (part of the HSBC World Tour), and the BWF Tour Super 100.

Women's singles

Year Tournament Level Opponent Score Result Ref
2022 Indonesia Masters Super 100 China Gao Fangjie 10–21, 12–21 2nd place, silver medalist(s) Runner-up
2023 Kaohsiung Masters Super 100 Chinese Taipei Liang Ting-yu 20–22, 21–15, 14–21 2nd place, silver medalist(s) Runner-up
2024 (I) Indonesia Masters Super 100 Japan Hina Akechi 21–10, 22–20 1st place, gold medalist(s) Winner
2026 Canada Open Super 300 Denmark Line Christophersen 21–15, 15–21, 21–6 1st place, gold medalist(s) Winner

BWF International Challenge/Series (8 titles, 3 runners-up)

Women's singles

Year Tournament Opponent Score Result Ref
2021 Belgian International Chinese Taipei Hsu Wen-chi 12–21, 21–16, 23–21 1st place, gold medalist(s) Winner
2022 Mexican International Japan Natsuki Nidaira 21–14, 19–21, 21–14 1st place, gold medalist(s) Winner
2022 Réunion Open Japan Natsuki Oie 21–5, 21–14 1st place, gold medalist(s) Winner
2022 (II) Indonesia International China Gao Fangjie 9–21, 11–21 2nd place, silver medalist(s) Runner-up
2022 Norwegian International Japan Natsuki Nidaira 21–14, 18–21, 16–21 2nd place, silver medalist(s) Runner-up
2022 Irish Open Japan Natsuki Nidaira 21–13, 21–11 1st place, gold medalist(s) Winner
2024 Thailand International Indonesia Mutiara Ayu Puspitasari 21–14, 21–15 1st place, gold medalist(s) Winner
2024 Luxembourg Open Japan Hina Akechi 16–21, 14–21 2nd place, silver medalist(s) Runner-up
2024 Denmark Challenge Japan Hina Akechi 20–22, 21–16, 21–11 1st place, gold medalist(s) Winner
2024 Saipan International Japan Asuka Takahashi 21–14, 14–21, 21–16 1st place, gold medalist(s) Winner
2024 Malaysia International Indonesia Ruzana 19–21, 21–15, 21–11 1st place, gold medalist(s) Winner
  BWF International Challenge tournament
  BWF International Series tournament

BWF Junior International (2 runners-up)

Girls' singles

Year Tournament Opponent Score Result Ref
2019 Dutch Junior International China Han Qianxi 13–21, 21–23 2nd place, silver medalist(s) Runner-up
2019 India Junior International Thailand Benyapa Aimsaard 19–21, 21–18, 21–23 2nd place, silver medalist(s) Runner-up
  BWF Junior International Grand Prix tournament

Performance timeline

Key
W F SF QF #R RR Q# A G S B NH N/A DNQ
(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; (G) gold, (S) silver or (B) bronze medal; (NH) not held; (N/A) not applicable; (DNQ) did not qualify.
To avoid confusion and double counting, these charts are updated at the conclusion of a tournament or when the player's participation has ended.

National team

Team events20182019Ref
Asian Junior Championships S QF
World Junior Championships B B
Team events2020202120222023202420252026Ref
Asia Team Championships G NH B NH A NH 5th
Asian Games NH A NH S
Uber Cup NH A B NH A NH B

Individual competitions

Events20182019Ref
Asian Junior Championships 1R A
World Junior Championships 4R G
Event2026Ref
Asian Championships QF
World Championships 1R
Tournament BWF World Tour Best Ref
2022 2023 2024 2025 2026
Malaysia Open A 1R 1R ('26)
India Open A 1R 1R ('26)
Thailand Masters NH 2R A 2R ('23)
German Open A 1R A SF A SF ('25)
All England Open A 2R 2R ('26)
Swiss Open A 1R A QF QF ('26)
Ruichang China Masters NH A 1R A 1R ('24)
Orléans Masters A QF QF QF ('25, '26)
Thailand Open A 2R 2R 2R ('25, '26)
Singapore Open A 2R 2R ('26)
Indonesia Open A 1R 1R ('26)
Macau Open NH QF SF A SF ('25)
U.S. Open NH A QF QF ('26)
Canada Open QF A W W ('26)
Japan Open A SF 1R SF ('25)
China Open NH A 2R 2R 2R ('25, '26)
Taipei Open A QF A QF ('25)
China Masters NH A 1R 1R 1R ('25, '26)
Indonesia Masters Super 100 F QF W A W ('24)
w/d A
Vietnam Open A 1R A 1R ('23)
Arctic Open NH A 2R 2R 2R ('25, '26)
Denmark Open A 1R 2R 2R ('26)
French Open A 2R 2R 2R ('25, '26)
Korea Open A Q ('26)
Japan Masters NH 2R w/d Q 2R ('24)
Kaohsiung Masters N/A F A F ('23)
Hong Kong Open NH A 2R A 2R ('25)
Syed Modi International A Q ('26)
Spain Masters NH 1R A NH 1R ('23)
Year-end ranking 42 103 39 27 27
Tournament20222023202420252026BestRef

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 Thailand Ratchanok Intanon 8 2023 Swiss Open 1R 21–15 retired 36
2 Indonesia Gregoria Mariska Tunjung 8 2025 Japan Open 1R 21–10, 21–12 32
3 China Han Yue 4 2025 Japan Open QF 21–17, 21–10 32
4 China Han Yue 5 2026 All England Open 1R 20–22, 21–17, 21–18 26

Record against selected opponents

Record against Year-end Finals finalists, World Championships semi-finalists, and Olympic quarter-finalists. Accurate as of 23 October 2026.

Player Matches Win Lost Diff.
China Han Yue 321+1
China Wang Zhiyi 303–3
India P. V. Sindhu 303–3
Indonesia Gregoria Mariska Tunjung 110+1
Indonesia Putri Kusuma Wardani 431+2
Japan Aya Ohori 101–1
Player Matches Win Lost Diff.
Japan Nozomi Okuhara 101–1
Japan Akane Yamaguchi 202–2
South Korea An Se-young 202–2
Thailand Pornpawee Chochuwong 101–1
Thailand Ratchanok Intanon 2110

References

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  2. ↑ "Results – 2016 OUE Singapore Youth International Series". Badminton World Federation. 4 December 2016.
  3. ↑ "Results – 2017 OUE Singapore Youth International Series". Badminton World Federation. 3 December 2017.
  4. ↑ "Hat-trick For Vitidsarn – World Juniors Finals". Badminton World Federation. 13 October 2019.
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