54 games in the PremovedPrep archive. Games as White.
| White | Black | Result | ECO | Event | Date |
|---|---|---|---|---|---|
| Okuno, Rion | Mammadova, Narmin | 1/2-1/2 | B12 | 37th International Chess Tournament Open Pula 2025 | 2025-06-21 |
| Okuno, Rion | Sherman, Raem | 1/2-1/2 | C72 | 37th International Chess Tournament Open Pula 2025 | 2025-06-19 |
| Okuno, Rion | Ledger, Andrew J | 0-1 | C10 | 37th International Chess Tournament Open Pula 2025 | 2025-06-18 |
| Okuno, Rion | Martinez Alcantara, Jose Eduardo | 0-1 | C70 | XLIV Open Internacional Villa de Benasque | 2025-06-18 |
| Okuno, Rion | Madularea, David | 0-1 | C11 | Round 9: Okuno, Rion - Madularea, David | 2024-12-30 |
| Okuno, Rion | Labruyere, Roger | 1/2-1/2 | B90 | Round 6: Okuno, Rion - Labruyere, Roger | 2024-12-27 |
| Okuno, Rion | Manish Anto Cristiano F | 0-1 | C41 | Round 4: Okuno, Rion - Manish Anto Cristiano F | 2024-12-24 |
| Okuno, Rion | Ritzerveld, Noah | 1-0 | C97 | Round 3: Okuno, Rion - Ritzerveld, Noah | 2024-12-23 |
| Okuno Okuno, Rion | Antipov, Mikhail Al. | 0-1 | B48 | 52nd Annual World Open | 2024-07-04 |
| Okuno Okuno, Rion | Palomino Landeo, Diego Fernando | 1-0 | C11 | Round 9: Okuno Okuno, Rion - Palomino Landeo, Diego Fernando | 2024-06-29 |
| Okuno Okuno, Rion | De La Maza Menares, Vicente Leon | 1-0 | B06 | Round 6: Okuno Okuno, Rion - De La Maza Menares, Vicente Leon | 2024-06-27 |
| Okuno Okuno, Rion | Abarca Gonzalez, Martin | 1-0 | C65 | Round 4: Okuno Okuno, Rion - Abarca Gonzalez, Martin | 2024-06-26 |
| Okuno Okuno, Rion | Bruna Poblete, Emilio | 1-0 | B38 | Round 2: Okuno Okuno, Rion - Bruna Poblete, Emilio | 2024-06-24 |
| Okuno Okuno, Rion | Sanchez Manzanares, Jorge Luis | 1-0 | C80 | Campeonato Nacional ABSOLUTO Panama 2024 | 2024-05-18 |
| Okuno Okuno, Rion | Havik, Victor | 1-0 | B42 | Fagernes International 2024 | 2024-03-30 |
| Okuno Okuno, Rion | Evenshaug, Amadeus Hestvik | 1/2-1/2 | B42 | Fagernes International 2024 | 2024-03-28 |
| Okuno Okuno, Rion | Akshit Kumar J | 1-0 | C42 | Fagernes International 2024 | 2024-03-27 |
| Okuno Okuno, Rion | Andersen, Morten | 0-1 | B32 | Fagernes International 2024 | 2024-03-26 |
| Rion Okuno Okuno | Elio Rafael Ortiz Calderon | 1-0 | B27 | Round 8: Rion Okuno Okuno - Elio Rafael Ortiz Calderon | 2023-11-10 |
| Rion Okuno Okuno | Ruben Abraham Ulloa | 1/2-1/2 | B01 | Round 6: Rion Okuno Okuno - Ruben Abraham Ulloa | 2023-11-09 |
| Rion Okuno Okuno | Orlando Husbands | 0-1 | B39 | Round 4: Rion Okuno Okuno - Orlando Husbands | 2023-11-08 |
| Rion Okuno Okuno | Sergio Duran | 0-1 | B33 | Round 2: Rion Okuno Okuno - Sergio Duran | 2023-11-07 |
| Okuno Rion | Nanjo Ryosuke | 0-1 | B90 | Round 6: Okuno Rion - Nanjo Ryosuke | 2023-07-17 |
| Okuno, Rion | Sarda, Pedro Sada | 1-0 | B48 | World Youth Cup 2021 O14-G14 - Open 14 | 2021-08-11 |
| Okuno, Rion | Nemsadze, Daviti | 0-1 | B72 | World Youth Cup 2021 O14-G14 - Open 14 | 2021-08-11 |
| Okuno, Rion | Romero, Gladimir Chester | 1-0 | B90 | World Youth Cup 2021 O14-G14 - Open 14 | 2021-08-11 |
| Okuno, Rion | mohamad, seder | 0-1 | B35 | World Youth Cup 2021 O14-G14 - Open 14 | 2021-08-11 |
| Okuno, Rion | Marocco, Gabriel Leao Quadros | 0-1 | B90 | World Youth Cup 2021 O14-G14 - Open 14 | 2021-08-11 |