| Final 18:56 | time | | L | | 1. Daiya Seto |  Japan | 4:08.79 | | 4 | | 2. Kosuke Hagino | Japan | 4:10.30 | | 5 | | 3. Wang Shun |  China | 4:12.31 | | 3 | | 4. Wang Yizhe | China | 4:19.61 | | 6 | | 5. Joo Jae-gu |  South Korea | 4:20.77 | | 1 | | 6. Nguyễn Hữu Kim Sơn |  Vietnam | 4:22.86 | | 8 | | 7. Cho Cheng-chi |  Taipei | 4:23.18 | | 7 | | 8. Kim Min-suk | South Korea | 4:23.39 | | 2 |
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| Venue: GBK Aquatic Center. |
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Heats - Wednesday 22.08 Morning session 09:47 |
| Ranking | time | | L | H | | 1. Daiya Seto | Japan | 4:16.16 | Q | 4 | 3 | | 2. Kosuke Hagino | Japan | 4:16.17 | Q | 4 | 2 | | 3. Wang Shun | China | 4:18.67 | Q | 5 | 3 | | 4. Wang Yizhe | China | 4:21.55 | Q | 5 | 2 | | 5. Kim Min-suk | South Korea | 4:21.95 | Q | 3 | 2 | | 6. Cho Cheng-chi | Taipei | 4:23.01 | Q | 6 | 2 | | 7. Joo Jae-gu | South Korea | 4:23.86 | Q | 3 | 3 | | 8. Nguyễn Hữu Kim Sơn | Vietnam | 4:27.18 | Q | 2 | 3 | | eliminated in Heats | | 9. Wang Hsing-hao | Taipei | 4:27.99 | | 6 | 3 | | 10.Aflah Fadlan Prawira |  Indonesia | 4:29.00 | | 2 | 2 | | 11.Zachary Ian Tan |  Singapore | 4:29.87 | | 7 | 2 | | 12.Pang Sheng Jun | Singapore | 4:29.94 | | 7 | 3 | | 13.Marcus Mok |  Hong Kong | 4:33.46 | | 1 | 3 | | 14.Jonathan Liao | Hong Kong | 4:41.60 | | 1 | 2 | | 15.Mohamed Abdelrahman |  Qatar | 4:46.30 | | 4 | 1 | | 16.Abdul Rahman Al-Kulaibi |  Oman | 4:54.22 | | 5 | 1 | | 17.Mubal Azzam Ibrahim |  Maldives | 5:35.41 | | 3 | 1 |
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