Minoru Koga Badminton
2026 Results, Match by Match

German Open

Super 300・Mülheim an der Ruhr, Germany

He came through qualifying into the main draw. On 25 February he beat 2nd seed Li Shi Feng (CHN) 21-16, 21-15 in 44 minutes, and on 26 February Lee Cheuk Yiu (HKG) 21-18, 21-11 in 39 minutes, both in straight games. The quarter-final on 27 February went to 6th seed Toma Junior Popov (FRA), 13-21, 21-19, 19-21 in 72 minutes: he levelled in the second game and lost the third by two points. 🆕These scores are carried as the 2026 results on our German Open 2027 page, published on 18 September 2026, and agree point by point with BWF's official day-by-day match data and the English Wikipedia draw. ⚠️We do not give scores for his qualifying matches, because only one source carries them.

76th All Japan Corporate Team Championships

All Japan Corporate Team Championships・Fukaya, Saitama, Japan

🆕He played two singles rubbers for AC Nagano Parceiro BC and won one. In the group stage he beat Shoma Kono of WAKOKAI 15-7, 15-9. 🔴Then he lost 13-15, 11-15 to BIPROGY's Koki Watanabe, who writes the same match on his page as 15-13, 15-11. He was also named at second singles in one earlier tie, which was decided before his rubber. ⚠️Neither score is our own primary record — our tournament page holds only the five rubbers of each final — both come from the official live-results site. Played to 15 points, best of three, with no match times published.

Indonesia Masters Super 100

Super 100・Pontianak, Indonesia

Seeded 7th, he had a bye in the first round, so his opening match here was the second round on 2 September: 9-21, 19-21 to NGUYEN Hai Dang (VIE) in 43 minutes. He took nine points in the opener and pushed the second game to 19-21. 🔁Nine days later the same opponent stands in the Vietnam Open quarter-final (see The same opponent in nine days).

Vietnam Open

Super 100・Ho Chi Minh City, Vietnam

A bye in the first round. He beat HUANG Ping-Hsien (TPE) 21-13, 12-21, 21-10 in 51 minutes on 9 September and Hein HTUT (MYA) 21-13, 21-10 in 37 minutes on 10 September. In the quarter-final on 11 September he beat NGUYEN Hai Dang (VIE) 22-20, 21-12 in 45 minutes — the same opponent who had beaten him nine days earlier — to reach the semi-finals. The opening game had to pass 20-20 to finish 22-20. 🆕He lost the semi-final on 12 September 21-14, 15-21, 17-21 in 68 minutes to Sholeh AIDIL (MAS), ending the week in the last four. He took the opening game 21-14, lost the second 15-21 and the decider 17-21. It started on Court 1 at 15:40 local time (17:40 in Japan) and finished at 18:53 Japan time. ⚠This score comes from BWF’s official day-matches data, not from our own tournament page. AIDIL was unseeded and went on to take the title, beating top seed TEH Jia Heng (SGP) 21-16, 21-14 in 45 minutes in the final on Sunday 13 September — Koga lost to the eventual champion.

Asian Games 2026

Asian Games・Ichinomiya, Aichi, Japan

He is not in the squad of ten men and ten women that the Nippon Badminton Association announced on 19 May 2026. The men's singles places went to Kodai Naraoka, Kenta Nishimoto, Yushi Tanaka and Koki Watanabe. The venue was Ichinomiya Municipal Gymnasium: team event 20 to 24 September, individual event 25 to 29 September.

80th All Japan Championships

All Japan Championships・Chofu, Tokyo

Japan's open national championship: no age or affiliation divisions, so high-school players and company-team players meet in the same draw. The 80th edition runs from 24 to 30 December 2026 at Keio Arena TOKYO in Chofu, Tokyo, and uses the three-game, 15-point format. ⚠We do not list Koga's past finishes here, because his club's official page and the specialist outlet SMASH and NET.TV give different placings for the same year. The draw is normally published one or two weeks before the event, and we do not guess at names.

On 2 September 2026 Koga lost 9-21, 19-21 to NGUYEN Hai Dang of Vietnam in the second round of the Indonesia Masters Super 100, without taking a game. Nine days later, on 11 September, he beat the same opponent 22-20, 21-12 in the Vietnam Open quarter-final — in Ho Chi Minh City, NGUYEN's home country.

• ❌2 September 2026 — Indonesia Masters Super 100, second round: 9-21, 19-21 in 43 minutes. Nine points in the opener, then 19-21 in the second game.
• ✅Friday 11 September 2026 — Vietnam Open, quarter-final: 22-20, 21-12 in 45 minutes, on Court 1 from 15:55 local time. The opening game went through 20-20 before he took it 22-20, and the second finished 21-12.
• 🔄Almost only the length matched. Nine days earlier: 43 minutes, no games won. This time: 45 minutes, both games won. Two minutes apart in length, and the games the other way round.
• 🔍Both meetings in between were wins. He beat HUANG Ping-Hsien (TPE) 21-13, 12-21, 21-10 on 9 September and Hein HTUT (MYA) 21-13, 21-10 on 10 September.

⚠This score is checked against two BWF official feeds — the day-by-day match data and the player data, and our own Vietnam Open 2026 page carried it later on 11 September. He then lost the semi-final the next day to Sholeh AIDIL (MAS) 21-14, 15-21, 17-21 in 68 minutes, ending the week in the last four.

We hold match-by-match scores for three of Koga's 2026 international events (🆕the German Open was added on 19 September 2026). The BWF official player data lists 16 for the same year. The result cards on this page are only a part of his season. Three of the missing ones are worth naming.

• 🥇8 to 11 January — Estonian International: champion, and the BWF player data records five wins from five rounds.
• 🥇15 to 18 January — Swedish Open: champion again, five wins from five rounds — two titles in two weeks. English Wikipedia adds that he beat Mads Christophersen of Denmark in both finals.
• 🥉12 to 17 May — Baoji China Masters (Super 100): semi-finals, as far as he has gone at the Vietnam Open.

⚠These three are the ones where the BWF player data and English Wikipedia agree. We hold no primary record of any of them, so none is a result card. What we record is not the same thing as a player's year.

🔄On 11 September 2026 we added a height of 166cm and a left playing hand to this page. Until then we had written that no Japanese-language source carried either field. That was our own oversight.

• 📗The Badminton Spirit player profile carries both: 166cm and left hand.
• 📘English Wikipedia gives height 1.66 m and handedness Left. The two agree to the centimetre.
• 🔴Our own tournament pages had said left-handed all along — the Vietnam Open 2026 and Indonesia Masters Super 100 2026 pages. Only the player page was saying it could not be verified.

⚠We publish only what two sources agree on. Sometimes, as here, the problem is not that no source exists but that we had not found it. When we notice, we fix it and date the fix. The link for corrections and removal requests is in the next section.

This page carries only facts that two sources agree on. Three things are left out, and it is fairer to say which.

• 🏆His past placings at the All Japan Championships: his club says last four in 2020, SMASH and NET.TV says last eight in 2020. Same year, different placing, so neither is listed.
• 🌌Foreign players' names: HUANG Ping-Hsien, Hein HTUT, NGUYEN Hai Dang and Sholeh AIDIL are written in the BWF official romanisation. We do not invent Japanese transliterations for names we cannot confirm.
• 📏Weight and blood type appear on the Badminton Spirit profile, but we do not publish fields that have nothing to do with the record of a match.

⚠Anything carried by only one source is left out. Corrections and removal requests are handled through the support link in the profile section above.

• 2026 — Vietnam Open (Super 100) — semi-finals
  He beat HUANG Ping-Hsien (TPE) 21-13, 12-21, 21-10 in 51 minutes on 9 September, Hein HTUT (MYA) 21-13, 21-10 in 37 minutes on 10 September, and NGUYEN Hai Dang (VIE) 22-20, 21-12 in 45 minutes in the quarter-final on 11 September. He was the last Japanese player left in the draw. He lost the semi-final on 12 September 21-14, 15-21, 17-21 in 68 minutes to Sholeh AIDIL (MAS).
• 2026 — Two titles in two weeks in January
  The BWF player data records both the Estonian International and the Swedish Open as won with five wins from five rounds, and English Wikipedia adds that he beat Mads Christophersen of Denmark in both finals. We hold no summary page for either event.
• 2026 — German Open — beat the then World No. 6
  On 25 February, through qualifying, he beat 2nd seed Li Shi Feng (CHN) 21-16, 21-15 in the first round. Badminton Europe wrote that the world No. 63 had eliminated the world No. 6. He then beat Lee Cheuk Yiu (HKG) 21-18, 21-11 before losing the quarter-final to Toma Junior Popov (FRA, 6th seed) 13-21, 21-19, 19-21.
• 2026 — 9th on Japan's national ranking, published 7 August 2026
  The Nippon Badminton Association's official men's singles list gives him 9th with 1,945.00 points for AC Nagano Parceiro BC; the Badminton Spirit list of the same date agrees. Both national and world rankings are updated regularly, so every ranking here carries its date.
• 2025 — Left NTT East to turn professional
  On 1 April 2025 he left his corporate position at NTT East and joined AC Nagano Parceiro Badminton Club as a professional. The club's official page states his goal of competing at, and medalling at, the 2028 Los Angeles Olympics.
• 2023 — All Japan Members Championships and Japan Ranking Circuit — champion
  His club's official record lists both national titles in that year. He had already won the All Japan Members Championships in 2019, which SMASH and NET.TV also records.
• 2018 — Canada Open (Super 100) — runner-up
  He reached his first BWF World Tour final while still a student at Waseda University. He also won the All Japan Intercollegiate men's singles title in both 2017 and 2018.
• 2014 — National High School Championships (Inter-High) — champion
  Both his club's official page and SMASH and NET.TV record the singles title that year; SMASH and NET.TV adds the team title as well.

His Vietnam Open 2026 ended in the semi-final on Saturday 12 September: 21-14, 15-21, 17-21 in 68 minutes to Sholeh AIDIL (MAS), so he finishes in the last four. It began on Court 1 at 15:40 local time (17:40 in Japan) and finished at 18:53 Japan time. AIDIL then won the final on Sunday 13 September, beating top seed TEH Jia Heng (SGP) 21-16, 21-14 (checked against BWF’s official match data and the English Wikipedia draw). 🗓️At the Arctic Open 2026 (6–11 October, Finland, Super 500), where he played as one of the self-funded entrants on the list the Nippon Badminton Association published on 11 September 2026, he lost in the first round on 7 October to fellow Japanese Yudai Okimoto 13-21, 8-21 (46 minutes). He is not in the BWF main draw for the Denmark Open 2026 (13–18 October) the following week. Nor is he among the Japanese players in the main draw for the French Open 2026 (20–25 October), published on 15 October (his name was not in the association's 11 September announcement either). ⚠️This Arctic Open match is not in the eight-match count above (score from Koga's side). The year’s calendar is on our 2026 tournament schedule.

🇯🇵He is not in Japan's squad for the 2026 Asian Games in Ichinomiya, Aichi, from 20 to 29 September. Of the ten men named on 19 May 2026, the men's singles places went to Kodai Naraoka, Kenta Nishimoto, Yushi Tanaka and Koki Watanabe.

⚠ The draw for the 80th All Japan Championships (24 to 30 December, Keio Arena TOKYO) has not been published, and we do not guess at names. The full calendar is on our 2026 badminton schedule page.

A results table says only "semi-finals". Set the five September matches side by side and the shape appears: on 9 September he dropped the second game 12-21 and came back to win; on 10 September he finished in 37 minutes in straight games; on 11 September he came through a 20-20 deuce to take the opening game 22-20. That he had lost to that same opponent nine days earlier without taking a game appears nowhere in a results table.

🔴Two ranking scales tell two different stories. On the BWF world ranking dated 8 September 2026 he is 53rd in men's singles; on Japan's national ranking published on 7 August 2026 he is 9th. Japanese men's singles is deep enough that ninth at home is 53rd in the world.

🏓Something else shows up only when our player pages are read side by side. Li Shi Feng, whom Koga beat at the German Open in February 2026, and Toma Junior Popov, who beat him in that quarter-final, both have 2026 pages here. The same season, read from the other side.

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.