Largest margins by Japan Women in WT20Is by Innings, runs & wickets
By runs
Winner | Margin | Balls Rem | Target | Overs | Max | Opposition | Ground | Match Date | Scorecard |
| 89 runs | 0 | 133 | 20.0 | 20.0 | v MNG Women | Incheon | 11 Oct 2024 | Women T20 # 2080 | |
| 59 runs | 0 | 84 | 12.5 | 20.0 | v PHI Women | Sano | 7 Jun 2025 | Women T20 # 2342 | |
| 48 runs | 0 | 153 | 20.0 | 20.0 | v Samoa Women | Port vila | 2 Sep 2023 | Women T20 # 1577 | |
| 42 runs | 0 | 99 | 19.4 | 20.0 | v SGP Women | Sano | 5 Oct 2024 | Women T20 # 2062 | |
| 32 runs | 0 | 130 | 20.0 | 20.0 | v SK Women | Incheon | 22 Sep 2019 | Women T20 # 768 | |
| 31 runs | 0 | 119 | 20.0 | 20.0 | v Fiji Women | Port Vila | 9 May 2019 | Women T20 # 644 | |
| 30 runs | 0 | 126 | 20.0 | 20.0 | v COK Women | Port vila | 1 Sep 2023 | Women T20 # 1567 | |
| 29 runs | 0 | 119 | 16.3 | 20.0 | v SGP Women | Sano | 6 Oct 2024 | Women T20 # 2065 | |
| 24 runs | 0 | 95 | 19.3 | 20.0 | v China Women | Sano | 6 Jun 2025 | Women T20 # 2337 | |
| 22 runs | 0 | 100 | 18.0 | 20.0 | v HKG Women | Sano | 8 Jun 2025 | Women T20 # 2348 | |
| 19 runs | 0 | 91 | 20.0 | 20.0 | v China Women | Incheon | 12 Oct 2024 | Women T20 # 2082 | |
| 17 runs | 0 | 112 | 20.0 | 20.0 | v SGP Women | Sano | 4 Oct 2024 | Women T20 # 2059 | |
| 14 runs | 0 | 131 | 20.0 | 20.0 | v Oman Women | Bangi | 10 Feb 2024 | Women T20 # 1759 | |
| 12 runs | 0 | 98 | 20.0 | 20.0 | v SK Women | Incheon | 19 Sep 2019 | Women T20 # 761 | |
| 11 runs | 0 | 107 | 20.0 | 20.0 | v China Women | Hangzhou | 26 May 2023 | Women T20 # 1447 |
By wickets
Winner | Margin | Balls Rem | Target | Overs | Max | Opposition | Ground | Match Date | Scorecard |
| 9 wickets | 67 | 54 | 8.5 | 20.0 | v SGP Women | Sano | 1 Oct 2024 | Women T20 # 2055 | |
| 9 wickets | 65 | 77 | 9.1 | 20.0 | v SGP Women | Sano | 2 Oct 2024 | Women T20 # 2056 | |
| 9 wickets | 89 | 33 | 5.1 | 20.0 | v SK Women | Incheon | 10 Oct 2024 | Women T20 # 2077 | |
| 8 wickets | 39 | 76 | 13.3 | 20.0 | v Fiji Women | Port vila | 4 Sep 2023 | Women T20 # 1599 | |
| 4 wickets | 9 | 76 | 18.3 | 20.0 | v China Women | Kuala Lumpur | 11 Feb 2024 | Women T20 # 1767 | |
| 2 wickets | 7 | 92 | 18.5 | 20.0 | v HKG Women | Incheon | 20 Sep 2019 | Women T20 # 763 |
By balls remaining in the second innings
Winner | Margin | Balls Rem | Target | Overs | Max | Opposition | Ground | Match Date | Scorecard |
| 9 wickets | 89 | 33 | 5.1 | 20.0 | v SK Women | Incheon | 10 Oct 2024 | Women T20 # 2077 | |
| 9 wickets | 67 | 54 | 8.5 | 20.0 | v SGP Women | Sano | 1 Oct 2024 | Women T20 # 2055 | |
| 9 wickets | 65 | 77 | 9.1 | 20.0 | v SGP Women | Sano | 2 Oct 2024 | Women T20 # 2056 | |
| 8 wickets | 39 | 76 | 13.3 | 20.0 | v Fiji Women | Port vila | 4 Sep 2023 | Women T20 # 1599 | |
| 4 wickets | 9 | 76 | 18.3 | 20.0 | v China Women | Kuala Lumpur | 11 Feb 2024 | Women T20 # 1767 | |
| 2 wickets | 7 | 92 | 18.5 | 20.0 | v HKG Women | Incheon | 20 Sep 2019 | Women T20 # 763 |
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