In the past year (2025), Kai Yamamoto (山本快) competed in 6 competitions and 23 rounds across 14 events, from Feb 16th to May 31st.
Solves/Attempts
He attempted 95 solves and completed 87.
| Event | Solves | Attempts |
| 3x3x3 Cube | 15 | 15 |
| 3x3x3 One-Handed | 10 | 10 |
| Megaminx | 10 | 10 |
| Skewb | 10 | 10 |
| Pyraminx | 9 | 10 |
| 3x3x3 Fewest Moves | 8 | 9 |
| Clock | 8 | 10 |
| Square-1 | 5 | 5 |
| 6x6x6 Cube | 3 | 3 |
| 7x7x7 Cube | 3 | 3 |
| 3x3x3 Blindfolded | 3 | 3 |
| 4x4x4 Blindfolded | 1 | 3 |
| 5x5x5 Blindfolded | 1 | 3 |
| 3x3x3 Multi-Blind | 1 | 1 |
Personal Bests
He broke his personal best 21 times across 11 events, including 13 singles and 8 averages.
| Event | Times | Single | Average |
| 3x3x3 Fewest Moves | 5 | 3 | 2 |
| Megaminx | 3 | 2 | 1 |
| 7x7x7 Cube | 2 | 1 | 1 |
| 3x3x3 Blindfolded | 2 | 1 | 1 |
| 3x3x3 One-Handed | 2 | 1 | 1 |
| Pyraminx | 2 | 1 | 1 |
| 3x3x3 Cube | 1 | 0 | 1 |
| Clock | 1 | 1 | 0 |
| 4x4x4 Blindfolded | 1 | 1 | 0 |
| 5x5x5 Blindfolded | 1 | 1 | 0 |
| 3x3x3 Multi-Blind | 1 | 1 | 0 |
Improvements of Single
| Event | ≤2024 | 2025 | Improvement |
| Pyraminx | 4.43 | 2.28 | 2.15 (94.30%) |
| 3x3x3 Fewest Moves | 37 | 23 | 14 (60.87%) |
| 4x4x4 Blindfolded | 5:37.18 | 4:31.48 | 1:05.70 (24.20%) |
| Megaminx | 58.56 | 51.47 | 7.09 (13.78%) |
| 3x3x3 Blindfolded | 59.47 | 54.67 | 4.80 (8.78%) |
| 3x3x3 One-Handed | 11.48 | 10.70 | 0.78 (7.29%) |
| 5x5x5 Blindfolded | 14:33.00 | 13:44.00 | 49.00 (5.95%) |
| Clock | 4.01 | 3.80 | 0.21 (5.53%) |
| 7x7x7 Cube | 3:35.32 | 3:32.29 | 3.03 (1.43%) |
| 3x3x3 Multi-Blind | 9/12 58:55 | 8/10 44:27 | 14:28 |
Improvements of Average
| Event | ≤2024 | 2025 | Improvement |
| 3x3x3 Fewest Moves | 38.67 | 24.67 | 14 (56.75%) |
| 3x3x3 Blindfolded | 1:19.44 | 59.65 | 19.79 (33.18%) |
| Megaminx | 1:09.91 | 57.08 | 12.83 (22.48%) |
| 3x3x3 One-Handed | 14.31 | 13.34 | 0.97 (7.27%) |
| Pyraminx | 5.48 | 5.12 | 0.36 (7.03%) |
| 3x3x3 Cube | 10.21 | 9.77 | 0.44 (4.50%) |
| 7x7x7 Cube | 3:44.16 | 3:38.60 | 5.56 (2.54%) |
Cubers
He met 293 cubers from 19 countries/regions, 83 of whom competed with him more than once.
| Shared Competitions | Competitors |
| 1 | 210 |
| 2 | 53 |
| 3 | 17 |
| 4 | 5 |
| 5 | 5 |
| 6 | 3 |
| All | 293 |
Regions
He competed in 1 country/region.
