| Jun 30, 2026 | Umetsubo | 0–1 | Fier | X Caioba STD | Tarrasch Defense: Symmetrical Variation | |
| Jun 30, 2026 | Piasetski | 0–1 | Umetsubo | X Caioba - STD | Queen's Indian Defense: Spassky System | |
| Jun 28, 2026 | Umetsubo | 1–0 | Rodrigues Mota | X Caioba - STD | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Jun 28, 2026 | Povia | 0–1 | Umetsubo | X TORNEIO INTERNACIONAL DE XADREZ SESC CAIOBÁ - STANDARD | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Jun 27, 2026 | Saiz Rodriguez | 1–0 | Umetsubo | X Caioba RPD | Sicilian Defense: Alapin Variation, Barmen Defense, Modern Line | |
| Jun 27, 2026 | Umetsubo | ½–½ | Cueto | X Caioba RPD | Wade Defense | |
| Jun 27, 2026 | Piasetski | ½–½ | Umetsubo | X Caioba RPD | Zukertort Opening | |
| Jun 27, 2026 | Becker | * | Umetsubo | X Caioba RPD | ? | |
| Jun 27, 2026 | Umetsubo | 0–1 | Fier | X Sesc Caioba BTZ | Caro-Kann Defense: Panov Attack, Fianchetto Defense | |
| Apr 20, 2026 | Umetsubo | 1–0 | Frare | Round 6: Umetsubo, Cesar Hidemitsu - Frare, Fernando Cesar | Queen's Gambit Declined: Modern Variation, Normal Line | |
| Apr 20, 2026 | Umetsubo | * | Alonso | Round 5: Umetsubo, Cesar Hidemitsu - Alonso, Raphael V. P. Patricio | King's Indian Defense: Orthodox Variation | |
| Apr 19, 2026 | Deretti | 0–1 | Umetsubo | Curitiba Chess Open 2026 - Pensado | Caro-Kann Defense: Exchange Variation | |
| Apr 19, 2026 | Umetsubo | ½–½ | Saito | Round 3: Umetsubo, Cesar Hidemitsu - Saito, Vinicius | King's Indian Defense: Orthodox Variation | |
| Apr 18, 2026 | Cezar | 0–1 | Umetsubo | Round 2: Cezar, Ricardo De Almeida - Umetsubo, Cesar Hidemitsu | Slav Defense: Exchange Variation | |
| Apr 18, 2026 | Umetsubo | 1–0 | Conor | Round 1: Umetsubo, Cesar Hidemitsu - Conor, Gilberto Bordignon | King's Indian Defense: Orthodox Variation, Bayonet Attack | |
| Apr 17, 2026 | Hoffman | ½–½ | Umetsubo | Round 7: Hoffman, Alejandro - Umetsubo, Cesar Hidemitsu | Torre Attack: Classical Defense | |
| Dec 19, 2025 | Quintiliano | * | Umetsubo | Round 9: Quintiliano, Renato R. - Umetsubo, Cesar Hidemitsu | Queen's Indian Defense: Kasparov-Petrosian Variation, Main Line | |
| Dec 18, 2025 | Umetsubo | ½–½ | Jardim | Round 8: Umetsubo, Cesar Hidemitsu - Jardim, Frederico Rodrigues | Indian Defense: London System | |
| Dec 18, 2025 | Kayser | ½–½ | Umetsubo | Round 7: Kayser, Gustavo Warmling - Umetsubo, Cesar Hidemitsu | Sicilian Defense: Kan Variation, Knight Variation | |
| Dec 16, 2025 | Di Berardino | ½–½ | Umetsubo | Round 5: Di Berardino, Diego Rafael - Umetsubo, Cesar Hidemitsu | Nimzo-Indian Defense: St. Petersburg Variation, Romanishin–Psakhis Variation | |
| Jul 6, 2025 | Di Berardino | 1–0 | Umetsubo | Round 9: Di Berardino, Diego Rafael - Umetsubo, Cesar Hidemitsu | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation | |
| Jul 4, 2025 | Viana Da Costa | ½–½ | Umetsubo | Round 7: Viana Da Costa, Fernando - Umetsubo, Cesar Hidemitsu | Queen's Gambit Declined: Three Knights Variation | |
| Jul 2, 2025 | Mareco | 1–0 | Umetsubo | Round 5: Mareco, Sandro - Umetsubo, Cesar Hidemitsu | Petrov's Defense: Classical Attack, Mason-Showalter Variation | |
| May 24, 2025 | Umetsubo | 0–1 | Hong | Round 3: Umetsubo, Cesar Hidemitsu - Hong, Andrew | Nimzo-Indian Defense: Classical Variation, Keres Defense | |
| Jan 26, 2025 | Jessel | 0–1 | Umetsubo | Round 10: Jessel, Stephen - Umetsubo, Cesar Hidemitsu | Réti Opening: Advance Variation, Michel Gambit | |
| Jan 25, 2025 | Umetsubo | 1–0 | Lopez Miller | Round 9: Umetsubo, Cesar Hidemitsu - Lopez Miller, Indalecio | Nimzo-Indian Defense: Classical Variation, Keres Defense | |
| Jan 24, 2025 | Louis | 0–1 | Umetsubo | Round 8: Louis, Corentin - Umetsubo, Cesar Hidemitsu | Bird Opening: Dutch Variation | |
| Jan 23, 2025 | Umetsubo | ½–½ | Stapenhorst | Round 7: Umetsubo, Cesar Hidemitsu - Stapenhorst, Matheus Frederico | Nimzo-Indian Defense: Classical Variation | |
| Jan 22, 2025 | Martins | * | Umetsubo | Round 6: Martins, Anderson Donay - Umetsubo, Cesar Hidemitsu | ? | |
| Jul 14, 2024 | Umetsubo | * | Lorenzon | Round 9: Umetsubo, Cesar Hidemitsu - Lorenzon, Eduardo Lucas | ? | |
| Jul 13, 2024 | Umetsubo | * | Rodrigues Mota | Round 8: Umetsubo, Cesar Hidemitsu - Rodrigues Mota, Romulo Cardoso S | ? | |
| Jul 12, 2024 | Umetsubo | 1–0 | Acosta | Round 6: Umetsubo, Cesar Hidemitsu - Acosta, Pablo Alejandro | Queen's Gambit Declined: Harrwitz Attack | |
| Jul 12, 2024 | Bueno | 1–0 | Umetsubo | Round 5: Bueno, Alfeu Junior Varela - Umetsubo, Cesar Hidemitsu | Sicilian Defense: Accelerated Dragon, Maróczy Bind, Gurgenidze Variation | |
| Jul 11, 2024 | Umetsubo | ½–½ | Rodi | Round 4: Umetsubo, Cesar Hidemitsu - Rodi, Luis Ernesto | Semi-Slav Defense: Botvinnik Variation | |
| Jul 10, 2024 | Viana | * | Umetsubo | Round 3: Viana, Daniel Fernandes - Umetsubo, Cesar Hidemitsu | ? | |
| Jul 10, 2024 | Bassani | * | Umetsubo | Round 2: Bassani, Jaison Jose - Umetsubo, Cesar Hidemitsu | ? | |
| Jul 9, 2024 | Umetsubo | * | Da Silva | Round 1: Umetsubo, Cesar Hidemitsu - Da Silva, Camila Evaristo | ? | |
| Jul 9, 2024 | Tari | 1–0 | Umetsubo | Round 7: Tari, Aryan - Umetsubo, Cesar Hidemitsu | Ruy Lopez: Morphy Defense, Anderssen Variation | |
| Jun 30, 2024 | Umetsubo | 1–0 | Cunha | Round 9: Umetsubo, Cesar Hidemitsu - Cunha, Lucas Aguiar | Nimzo-Indian Defense: Classical Variation, Milner-Barry Variation | |
| Jun 29, 2024 | Santiago | 1–0 | Umetsubo | Round 8: Santiago, Yago De Moura - Umetsubo, Cesar Hidemitsu | Queen's Gambit Declined: Three Knights Variation | |
| Jun 28, 2024 | Umetsubo | 1–0 | Piccoli | Round 7: Umetsubo, Cesar Hidemitsu - Piccoli, Lucas Fonseca | Nimzo-Indian Defense: Classical Variation, Milner-Barry Variation | |
| Jun 27, 2024 | Bueno | 0–1 | Umetsubo | Round 6: Bueno, Alfeu Junior Varela - Umetsubo, Cesar Hidemitsu | Italian Game: Classical Variation, Giuoco Pianissimo, with a6 | |
| Jun 26, 2024 | Umetsubo | 0–1 | Delgado Ramirez | Round 5: Umetsubo, Cesar Hidemitsu - Delgado Ramirez, Neuris | Indian Defense: London System | |
| Jun 25, 2024 | Di Berardino | ½–½ | Umetsubo | Round 4: Di Berardino, Diego Rafael - Umetsubo, Cesar Hidemitsu | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Jun 25, 2024 | Umetsubo | 1–0 | Cueto | Round 3: Umetsubo, Cesar Hidemitsu - Cueto, Jonny | Philidor Defense: Lion Variation | |
| Aug 23, 2022 | Altschuler | ½–½ | Umetsubo | Mirandela2022 | Vienna Game: Stanley Variation, Alekhine Variation | |
| Aug 22, 2022 | Umetsubo | 0–1 | Levin | Mirandela2022 | Queen's Pawn Game: Accelerated London System | |
| Aug 21, 2022 | Umetsubo | 1–0 | Prado Acebo | Mirandela2022 | Indian Defense | |
| Aug 21, 2022 | Pinto | 0–1 | Umetsubo | Mirandela2022 | Réti Opening: Anglo-Slav Variation, London Defensive System | |
| Aug 20, 2022 | Schenderowitsch | ½–½ | Umetsubo | Mirandela2022 | Queen's Indian Defense: Classical Variation, Traditional Variation | |
| Aug 19, 2022 | Goncalves | ½–½ | Umetsubo | Mirandela2022 | Catalan Opening: Open Defense, Classical Line | |
| Aug 18, 2022 | Umetsubo | 0–1 | Silva | Mirandela2022 | Indian Defense | |
| Aug 18, 2022 | Torres | 0–1 | Umetsubo | Mirandela2022 | Torre Attack: Classical Defense | |