In the past year (2025), Hajun Sung (성하준) competed in 8 competitions and 31 rounds across 9 events, from Jan 18th to Aug 17th.
Solves/Attempts
He attempted 152 solves and completed 149.
| Event | Solves | Attempts |
| 3x3x3 Cube | 45 | 45 |
| 2x2x2 Cube | 29 | 30 |
| 4x4x4 Cube | 20 | 20 |
| Pyraminx | 15 | 15 |
| Skewb | 14 | 15 |
| Megaminx | 10 | 10 |
| 3x3x3 One-Handed | 7 | 7 |
| 5x5x5 Cube | 5 | 5 |
| Clock | 4 | 5 |
Personal Bests
He broke his personal best 33 times across 9 events, including 17 singles and 16 averages.
| Event | Times | Single | Average |
| 3x3x3 Cube | 7 | 3 | 4 |
| 4x4x4 Cube | 6 | 3 | 3 |
| Skewb | 5 | 2 | 3 |
| 2x2x2 Cube | 4 | 3 | 1 |
| 3x3x3 One-Handed | 3 | 2 | 1 |
| 5x5x5 Cube | 2 | 1 | 1 |
| Clock | 2 | 1 | 1 |
| Megaminx | 2 | 1 | 1 |
| Pyraminx | 2 | 1 | 1 |
Improvements of Single
| Event | ≤2024 | 2025 | Improvement |
| 4x4x4 Cube | 2:04.84 | 53.07 | 1:11.77 (135.24%) |
| 3x3x3 Cube | 18.32 | 11.09 | 7.23 (65.19%) |
| 2x2x2 Cube | 4.41 | 3.46 | 0.95 (27.46%) |
| Clock | 20.79 | 16.59 | 4.20 (25.32%) |
| Pyraminx | 6.97 | 6.79 | 0.18 (2.65%) |
| Skewb | - | 10.37 | - |
| 3x3x3 One-Handed | - | 44.34 | - |
| 5x5x5 Cube | - | 2:23.44 | - |
| Megaminx | - | 1:41.87 | - |
Improvements of Average
| Event | ≤2024 | 2025 | Improvement |
| 3x3x3 Cube | 22.38 | 13.75 | 8.63 (62.76%) |
| 2x2x2 Cube | 5.70 | 4.77 | 0.93 (19.50%) |
| Pyraminx | 10.18 | 8.92 | 1.26 (14.13%) |
| 4x4x4 Cube | - | 1:00.27 | - |
| Skewb | - | 14.91 | - |
| 3x3x3 One-Handed | - | 49.86 | - |
| 5x5x5 Cube | - | 2:32.37 | - |
| Clock | - | 19.65 | - |
| Megaminx | - | 1:53.11 | - |
Cubers
He met 964 cubers from 17 countries/regions, 267 of whom competed with him more than once.
| Shared Competitions | Competitors |
| 1 | 697 |
| 2 | 141 |
| 3 | 57 |
| 4 | 38 |
| 5 | 20 |
| 6 | 11 |
| All | 964 |
Regions
He competed in 3 countries/regions.
| Region | Times |
| Korea | 6 |
| Vietnam | 1 |
| Japan | 1 |
