Kakeru Kumagai / Hiroki Nishi
Badminton 2026 Results, Match by Match

Swiss Open 2026

Super 300・Basel, Switzerland

🆕Two matches at the Swiss Open, one win and one defeat. First round, 10 March: HE Zhi-Wei / HUANG Jui-Hsuan (TPE) 11-21, 21-12, 21-15 — they lost the opening game 11-21 and turned it round. Second round, 12 March: 7th seeds Daniel LUNDGAARD / Mads VESTERGAARD (DEN), 18-21, 19-21. ⚡Those opponents went all the way to the final on 15 March and finished runners-up. 🔴The pair who beat them in that final were LEE Fang-Chih / LEE Fang-Jen (TPE, 6th seeds) — the same pair Kumagai and Nishi beat 21-12, 18-21, 21-18 in the World Championships first round five months later, on 17 August (see the pair who reached the final). ⚠️We hold no match times for either of these. 🆕Added on 21 September 2026: both results were already on our own Swiss Open 2027 page as the 2026 results. ⚠️The Nippon Badminton Association's day page for 12 March labels that second round "third round"; English Wikipedia and our own tournament page call it the second round. The opponent, the score and the date agree across all three.

76th All Japan Corporate Team Championships

All Japan Corporate Team Championships・Fukaya, Saitama, Japan

🆕They played all five of BIPROGY's first-doubles rubbers and won all five, dropping just one game — the first game of the final. 🔴The final on 21 June was against a pair who have a page on this site: they beat Tonami Transportation's Takuro Hoki and Shuntaro Mezaki 7-15, 15-7, 17-15; our tournament page writes it from Tonami's side as 15-7, 7-15, 15-17. Semi-final, 20 June: 15-10, 15-11 against Yuta Takei / Yuto Nakashizu (NTT East). Quarter-final: 15-11, 15-8 against Riei Ito / Yota Uchino (Kanazawa Gakuin Club). Group stage: 15-10, 16-14 and 15-8, 15-11. BIPROGY finished runners-up in both the men's and the women's competition, and the pair were given the men's fighting-spirit award (BIPROGY's own report of 22 June 2026). ⚠️Of these five, only the final is our own primary record; the other four come from the official live-results site. This event is played to 15 points, best of three, and no match times are published.

Daihatsu Japan Open

Super 750・Tokyo Metropolitan Gymnasium

The first round on 14 July was an all-Japanese tie: they beat Yuichi Shimogami and Takumi Nomura 21-13, 21-16 in 31 minutes. In the second round on 16 July they lost 14-21, 18-21 in 40 minutes to top seeds KIM Won Ho / SEO Seung Jae (KOR). They closed the second game to 18-21.

China Open

Super 1000・Changzhou, China

🔴This is the deepest run of the six 2026 events we had recorded for them up to 6 September. In the first round on 21 July they beat CHIU Hsiang Chieh / WANG Chi-Lin (TPE) 21-6, 21-23, 21-11 in 49 minutes: they took the opening game 21-6, lost the second 21-23 and closed out the decider 21-11. In the second round on 23 July they beat MAN Wei Chong / SOH Wooi Yik (MAS) 21-16, 21-17 in 31 minutes. ⚠️That score and the 31 minutes come from the day data published by BWF, because our own tournament page records only a straight-games win — they are not our own primary record. In the quarter-final on 24 July they lost to Ben LANE / Sean VENDY (ENG) 9-21, 21-18, 17-21 in 66 minutes. At 66 minutes it is the longest time we hold for them in 2026 up to 6 September.

BWF World Championships 2026

World Championships・New Delhi, India

In the first round on 17 August they beat LEE Fang-Chih / LEE Fang-Jen (TPE) 21-12, 18-21, 21-18 in 60 minutes. In the second round on 18 August they lost 14-21, 14-21 in 30 minutes to 14th seeds CHIU Hsiang Chieh / WANG Chi-Lin (TPE), and both Japanese men's doubles pairs went out on the same day. At 30 minutes it is the shortest time we hold for them in 2026 up to 6 September. 🔴Those 14th seeds are the same pairing they had beaten 28 days earlier in the China Open first round (see the same opponents twice).

China Masters

Super 750・Shenzhen, China

They lost the first round on 2 September to CHIA Wei Jie / TEO Ee Yi (MAS) 21-16, 19-21, 20-22. 🔴They led the decider 20-17 — one point from the match — and then lost five points in a row. ⚠️The match time differs by one minute between our sources: our tournament page has 54 minutes and the BWF day data 55, so we give both. The tournament runs to Sunday 6 September, but their week ended in the first round.

Asian Games 2026

Asian Games・Ichinomiya, Aichi, Japan

In the individual event they reached the quarter-finals. They beat a Hong Kong pair 21-19, 19-21, 21-12 in the first round (25 September) and came from a game down to beat LEE Jhe-Huei / YANG Po-Hsuan (TPE) 20-22, 21-17, 21-12 in the second (26 September). In the quarter-final on 27 September they took the first game against the first seeds Kim Won-ho / Seo Seung-jae (KOR) and lost 21-15, 17-21, 15-21; the Koreans went on to take bronze. Hoki / Kobayashi lost in the second round, so this was Japan's only men's doubles pair in the last eight. In the team event Japan's men (fourth seeds) beat Kazakhstan 3-0 and lost 0-3 to India in the quarter-final (we have not recorded which ties this pair played). ⚠️These three matches are not yet in the count above.

Arctic Open 2026

Super 500・Vantaa, Finland

Entered on the association's self-funded list, they lost their first-round match on 7 October to Oliver BUTLER / Samuel JONES (ENG) 20-22, 18-21 (41 minutes). Of the three Japanese men's doubles pairs in the main draw, only Hoki / Kobayashi reached the second round (Shimogami / Nomura, on the self-funded list, were not in the draw). ⚠️This match is not yet in the count above either.

Denmark Open 2026

Super 750・Odense, Denmark

They played as part of the Japan squad the Nippon Badminton Association named on 11 September 2026. They beat Christo Popov / Toma Junior Popov (FRA) 21-14, 21-18 in the first round on 13 October and eighth seeds Ben LANE / Sean VENDY (ENG) 21-19, 23-21 in the second round on 15 October. Their second-round opponents were the pair who beat them in the China Open quarter-final in July. In the quarter-final on Friday 16 October they lost 5-21, 17-21 to the first seeds KIM Won Ho / SEO Seung Jae (KOR), who also beat them in the Asian Games quarter-final in September. ⚠️These three matches are not in the count above (up to 6 September) either (scores from Kumagai and Nishi's side).

S/J League 2026-27

Japan domestic league・BIPROGY, men's J block

Japan's top company-team league. BIPROGY's men are in the J block with Tonami Transportation, Toyota Tsusho, Daido Steel, Tokai Kogyo and JR Hokkaido. It starts on Saturday 31 October 2026 and runs to the TOP4 Tournament on Sunday 21 February 2027, across 15 venues.

80th All Japan Championships

All Japan Championships・Chofu, Tokyo

Japan's national championship. According to BIPROGY's official career summaries, both players finished third in the men's doubles at the 2024 and the 2025 All Japan Championships. We have not yet confirmed the 2026 entry list.

Up to 6 September 2026 we hold eleven matches from six tournaments for this pair — six wins and five losses (the later matches at the Asian Games, the Arctic Open and the Denmark Open are not in this count). Two of them came against CHIU Hsiang Chieh / WANG Chi-Lin (TPE) inside 28 days, and the results were opposites.

• 🟢21 July — China Open, first round (Super 1000). 21-6, 21-23, 21-11 in 49 minutes. They conceded six points in the opening game and lost only the second, 21-23.
• 🔴18 August — BWF World Championships, second round. 14-21, 14-21 in 30 minutes. By then the same pair were seeded 14.

Those 30 minutes are the shortest time we hold for them in 2026 up to 6 September. ⚠️No match times are published for the June team championships, so those five are outside this comparison. The longest is the 66-minute China Open quarter-final on 24 July against Ben LANE / Sean VENDY (ENG), so the shortest and the longest both fall inside the same month of the season.

Their ranking. They are world No. 19 in men's doubles on the list of 13 October 2026 (50,588 points from 18 counting tournaments). The official BWF ranking (Week 42) and the specialist outlet Badminton Spirit agree on both the place and the points; a week earlier, on 8 September, they were 21st on the same total. On our own site they were 23rd as of 5 May 2026, in the Japan squad list on our Asian Games 2026 page.

Rankings are updated every week. We publish them only as dated records, never as a bare world number.

🔴In the finals of the 76th All Japan Corporate Team Championships on 21 June 2026, the first-doubles rubber in both the men's and the women's tie was between pairs who have a page on this site. Our All Japan Corporate Team Championships 2026 page holds both rubbers as a primary record, inside the five rubbers of each final.

• 🟢Men's final, first doubles — this pair beat Takuro Hoki and Shuntaro Mezaki 7-15, 15-7, 17-15. Tonami Transportation still took the tie 3-1, their first title since 2018.
• 🔵Women's final, first doubles — Sayaka Hirota and Ayako Sakuramoto beat Kie Nakanishi and Rin Iwanaga 15-12, 14-16, 15-11, and Gifu Bluvic took the tie 3-2 for their first title.
• 🔎The same shape, the opposite outcome — the side that won the men's first doubles lost the tie, while the side that won the women's first doubles went on to win it. A tie is five rubbers and the first team to three wins it, so winning first doubles guarantees nothing.

Scores are our own tournament page's record and match the official live-results site. The event is played to 15 points, best of three, and no match times are published.

🔴The pair who stopped Kumagai and Nishi in March finished runners-up at that tournament — and five months later the two of them beat the pair who had won that final. The three results sit on different pages, so they only join up once the results are re-sorted by player.

• ❌12 March | Swiss Open 2026, second round — 7th seeds Daniel LUNDGAARD / Mads VESTERGAARD (DEN), 18-21, 19-21.
• 🥈15 March | the final of the same tournament — Lundgaard and Vestergaard lost it to LEE Fang-Chih / LEE Fang-Jen (TPE, 6th seeds) 18-21, 13-21.
• ⭕17 August | BWF World Championships 2026, first round — Kumagai and Nishi beat those same Lees 21-12, 18-21, 21-18 in 60 minutes.

We do not write about why any of this happened; what is listed above is only the dates and the scores. ⚠️The final is written from the winners' side; the other two lines are from Kumagai and Nishi's point of view. Sources: the Nippon Badminton Association's day pages for the 2026 Swiss Open and the draw tables in English Wikipedia.

• 2018 — All Japan Junior — men's doubles title (Kumagai)
  From BIPROGY's official career summary. He was in a different partnership then, so this is not a result of the current pair.
• 2023 — All Japan Intercollegiate — Kumagai won, Nishi was runner-up
  BIPROGY's summaries put Kumagai first and Nishi second at the same 2023 event, in separate partnerships.
• 2024 — Runners-up at the Odisha Masters and the Kazakhstan International Challenge
  Both appear with the same year and the same result in each player's summary. Our Odisha Masters 2026 page covers the 2026 edition.
• 2025 — Kaohsiung Masters and Northern Marianas Open titles
  Both titles appear for both players in the international section of BIPROGY's official summaries. 🔴Our own Kaohsiung Masters 2026 page holds the score of that final: at the 2025 edition, from 23 to 28 September in Kaohsiung, Taiwan, they beat SU Ching-heng / WU Kuan-lun (TPE) 21-18, 21-17. Japan took four of the five titles at that tournament, and six of the ten finalists were Japanese.
• 2025 — Indonesia Masters (Super 100) runners-up
  Our Indonesia Masters Super 100 2026 page also records Kumagai and Nishi as men's doubles runners-up at the 2025 first edition, which matches BIPROGY's summary.
• 2025 — All Japan Corporate Championships — men's doubles title
  It appears with the same year and result for both players. Our All Japan Corporate 2026 page covers the 2026 edition, from 4 to 9 September in Nagano. We have not confirmed whether they played in 2026.
• 2024 and 2025 — All Japan Championships — third in men's doubles, two years running
  Both years appear in both summaries. The next edition is the 80th All Japan Championships, from 24 to 30 December.
• Mixed doubles — Nishi won the Vietnam Open mixed doubles in 2023
  According to BIPROGY's official summary, Nishi also won the 2023 Vietnam Open and Kaohsiung Masters in mixed doubles and was runner-up in mixed doubles at the 2024 All Japan Championships. ⚠️The mixed partnership that won Kaohsiung in 2023 no longer exists — our Kaohsiung Masters 2026 page records that it broke up and that Nishi now concentrates on men's doubles with Kumagai.

Their most recent match was the Denmark Open 2026 quarter-final on Friday 16 October: they lost 5-21, 17-21 to the first seeds KIM Won Ho / SEO Seung Jae (KOR), the pair who also beat them in the Asian Games quarter-final in September, and went out in the last eight. In the second round on 15 October they beat eighth seeds Ben LANE / Sean VENDY (ENG) 21-19, 23-21, the pair who beat them 9-21, 21-18, 17-21 in the China Open quarter-final in July. In the first round on 13 October they beat Christo Popov / Toma Junior Popov (FRA) 21-14, 21-18. Before that they lost in the first round of the Arctic Open 2026 on 7 October (20-22, 18-21), and before that, at the Asian Games 2026, they reached the quarter-finals and lost 21-15, 17-21, 15-21 to the Korean first seeds.

🗓️October in Europe: They are in the Japan squad the Nippon Badminton Association named on 11 September 2026 for the Denmark Open and the French Open in men's doubles. At the Denmark Open 2026 (13–18 October, Denmark, Super 750) they won their first-round match on 13 October, then beat eighth seeds Ben LANE / Sean VENDY (ENG) 21-19, 23-21 in the second round on 15 October, then lost 5-21, 17-21 to the first seeds KIM Won Ho / SEO Seung Jae (KOR) in the quarter-finals on 16 October. ⚠️These three matches are not in the count above either. After that comes the French Open 2026 (20–25 October, France, Super 750). In the main draw published on 15 October, their first-round opponents are MAN Wei Chong / TEE Kai Wun (MAS).

At home come the S/J League 2026-27 from Saturday 31 October (BIPROGY, men's J block) and the 80th All Japan Championships from Thursday 24 December.

⚠️ Their French Open opponents from the second round on and the entry lists for the S/J League and the All Japan Championships have either not been published or we have not confirmed them. We do not print guessed entries. We update this page and the tournament pages once they are confirmed.

Six of the eleven 2026 matches we had recorded for this pair up to 6 September went to a third game, and four of their five defeats contain a game they lost from 18 points or better — 20-22, 19-21, 18-21 and 17-21 (both figures are within the count up to 6 September). Keeping a record of where the run of lost points started, rather than the final margin, is what helps the second time you meet the same opponents.

Badsheet records your own matches point by point, builds an official-style scoresheet and charts win rate and shot placement.

📮 Corrections and removal. This is an unofficial summary built from published information. If anything here is factually wrong, or if the player or their team would like this page taken down, please contact us and we will correct or remove it promptly. We do not publish anything about injuries, health or private life.