Highest totals by Japan in T20Is
Highest totals
Team | Score | Overs | RR | Inns | Opposition | Ground | Result | Match Date | Scorecard |
| 258/0 | 20.0 | 12.90 | 1 | v China | Mong Kok | won | 15 Feb 2024 | T20I # 2470 | |
| 253/4 | 20.0 | 12.65 | 1 | v Mongolia | Sano | n/r | 8 May 2024 | T20I # 2594 | |
| 232/5 | 20.0 | 11.60 | 1 | v Mongolia | Sano | won | 12 May 2024 | T20I # 2606 | |
| 223/7 | 20.0 | 11.15 | 1 | v Mongolia | Sano | won | 11 May 2024 | T20I # 2602 | |
| 218/8 | 20.0 | 10.90 | 1 | v South Korea | Sano | won | 15 Oct 2022 | T20I # 1822 | |
| 217/7 | 20.0 | 10.85 | 1 | v Mongolia | Sano | won | 8 May 2024 | T20I # 2593 | |
| 216/3 | 20.0 | 10.80 | 1 | v Mongolia | Sano | won | 11 May 2024 | T20I # 2603 | |
| 215/3 | 20.0 | 10.75 | 1 | v Singapore | Bangkok | lost | 11 Feb 2024 | T20I # 2460 | |
| 199/5 | 20.0 | 9.95 | 1 | v Mongolia | Sano | won | 7 May 2024 | T20I # 2591 | |
| 185/8 | 20.0 | 9.25 | 2 | v Hong Kong | Mong Kok | lost | 17 Feb 2024 | T20I # 2478 | |
| 179/4 | 17.0 | 10.52 | 1 | v Indonesia | Sano | won | 10 Oct 2022 | T20I # 1813 | |
| 179/5 | 20.0 | 8.95 | 1 | v Hong Kong | Mong Kok | lost | 14 Feb 2024 | T20I # 2469 | |
| 173/2 | 20.0 | 8.65 | 1 | v Indonesia | Incheon | won | 5 Oct 2024 | T20I # 2895 | |
| 166/7 | 20.0 | 8.30 | 1 | v Philippines | Port Moresby | won | 22 Jul 2023 | T20I # 2153 | |
| 166/6 | 20.0 | 8.30 | 1 | v Thailand | Bangkok | won | 2 Feb 2024 | T20I # 2446 | |
| 155/7 | 20.0 | 7.75 | 1 | v South Korea | Incheon | won | 4 Oct 2024 | T20I # 2892 | |
| 150/8 | 20.0 | 7.50 | 1 | v Maldives | Bangkok | won | 4 Feb 2024 | T20I # 2450 | |
| 143 | 19.3 | 7.33 | 1 | v China | Mong Kok | won | 16 Feb 2024 | T20I # 2476 | |
| 143/7 | 20.0 | 7.15 | 1 | v Indonesia | Sano | won | 9 Oct 2022 | T20I # 1810 | |
| 142/8 | 20.0 | 7.10 | 2 | v Singapore | Bangkok | lost | 6 Feb 2024 | T20I # 2453 | |
| 139/8 | 20.0 | 6.95 | 1 | v Cook Islands | Sano | won | 14 May 2025 | T20I # 3182 | |
| 136 | 19.5 | 6.85 | 1 | v Vanuatu | Port Moresby | lost | 28 Jul 2023 | T20I # 2175 | |
| 131 | 19.4 | 6.66 | 1 | v Vanuatu | Port Moresby | won | 23 Jul 2023 | T20I # 2155 | |
| 128 | 18.5 | 6.79 | 2 | v Hong Kong | Mong Kok | lost | 15 Feb 2024 | T20I # 2472 | |
| 127 | 19.0 | 6.68 | 1 | v Hong Kong | Hangzhou | lost | 1 Oct 2023 | T20I # 2270 | |
| 127/9 | 20.0 | 6.35 | 1 | v Philippines | Port Moresby | won | 26 Jul 2023 | T20I # 2170 | |
| 126/7 | 18.1 | 6.93 | 2 | v Cambodia | Hangzhou | won | 27 Sep 2023 | T20I # 2256 | |
| 121/4 | 13.0 | 9.30 | 1 | v Indonesia | Incheon | won | 1 Oct 2024 | T20I # 2882 | |
| 121/7 | 20.0 | 6.05 | 1 | v Philippines | Incheon | won | 2 Oct 2024 | T20I # 2886 | |
| 110/9 | 20.0 | 5.50 | 1 | v Thailand | Sano | won | 8 May 2025 | T20I # 3177 | |
| 109/6 | 14.0 | 7.78 | 1 | v Philippines | Incheon | won | 26 Sep 2024 | T20I # 2865 | |
| 107/8 | 17.5 | 6.00 | 2 | v Cook Islands | Sano | won | 13 May 2025 | T20I # 3181 | |
| 106/8 | 20.0 | 5.30 | 1 | v P.N.G. | Port Moresby | lost | 29 Jul 2023 | T20I # 2182 | |
| 106/8 | 20.0 | 5.30 | 1 | v Thailand | Sano | lost | 11 May 2025 | T20I # 3180 | |
| 105 | 19.3 | 5.38 | 1 | v Cook Islands | Sano | won | 9 May 2025 | T20I # 3179 | |
| 104/9 | 20.0 | 5.20 | 1 | v Indonesia | Incheon | won | 25 Sep 2024 | T20I # 2861 | |
| 103 | 18.4 | 5.51 | 1 | v Indonesia | Sano | lost | 18 Oct 2022 | T20I # 1829 | |
| 97/8 | 19.5 | 4.89 | 2 | v Philippines | Incheon | won | 28 Sep 2024 | T20I # 2870 | |
| 97/8 | 20.0 | 4.85 | 1 | v Saudi Arabia | Bangkok | lost | 9 Feb 2024 | T20I # 2457 | |
| 95/2 | 8.2 | 11.40 | 2 | v South Korea | Sano | won | 17 Oct 2022 | T20I # 1827 | |
| 87/8 | 20.0 | 4.35 | 1 | v P.N.G. | Port Moresby | lost | 25 Jul 2023 | T20I # 2164 | |
| 84/6 | 9.5 | 8.54 | 2 | v Indonesia | Sano | won | 16 Oct 2022 | T20I # 1824 | |
| 79/3 | 11.1 | 7.07 | 2 | v South Korea | Incheon | won | 29 Sep 2024 | T20I # 2874 | |
| 79 | 16.3 | 4.78 | 1 | v Indonesia | Sano | lost | 11 Oct 2022 | T20I # 1814 | |
| 27/0 | 1.2 | 20.25 | 2 | v Mongolia | Sano | won | 9 May 2024 | T20I # 2595 |
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