| 18th Asian Junior Athletics Championships | |
| Size: | 120 px |
| Colour: |
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| Host City: | Gifu, Japan |
| Dates: | 7–10 June |
| Stadium: | Gifu Nagaragawa Stadium |
| Nations Participating: | 35 |
| Athletes Participating: | 437 |
| Events: | 44 |
| Level: | Junior (under-20) |
| Records Set: | 6 championship records |
| Previous: | 2016 Ho Chi Minh City |
| Next: | 2023 Yecheon |
The 2018 Asian Junior Athletics Championships was the 18th edition of the international athletics competition for Asian under-20 athletes, organised by the Asian Athletics Association and the Japan Association of Athletics Federations. Athletes born between 1999 and 2002 competed in 44 events, divided evenly between the sexes. The competition took place over four days from 7–10 June at Gifu Nagaragawa Stadium in Gifu, Japan.[1]
| 100 metres | 10.27 | 10.35 | 10.46 | ||||
| 200 metres | 21.05 | 21.06 | 21.09 | ||||
| 400 metres | 45.79 | 46.96 | 47.08 | ||||
| 800 metres | 1:54.11 | 1:54.23 | 1:54.55 | ||||
| 1500 metres | 3:49.30 | 3:49.66 | 3:49.75 | ||||
| 5000 metres | 14:15.24 | 14:17.26 | 14:25.25 | ||||
| 10,000 metres | 30:01.51 | 30:04.24 | 30:05.30 | ||||
| 110 m hurdles | 13.61 | 13.71 | 13.81 | ||||
| 400 m hurdles | 50.52 | 50.55 | 51.18 | ||||
| 3000 m steeplechase | 8:51.97 | 8:52.79 | 8:59.32 | ||||
| 10,000 m walk | 42:47.98 | 42:53.56 | 43:06.89 | ||||
| 4 × 100 m relay | 39.65 | 39.72 | 40.75 | ||||
| 4 × 400 m relay | 3:08.70 | 3:09.20 | 3:09.60 | ||||
| High jump | 2.16 m | 2.14 m | 2.12 m | ||||
| Pole vault | 5.20 m | 5.15 m | 5.00 m | ||||
| Long jump | 7.61 m | 7.54 m | 7.47 m | ||||
| Triple jump | 15.75 m | 15.56 m | 15.47 m | ||||
| Shot put | 18.57 m | 18.25 m | 18.22 m | ||||
| Discus throw | 62.29 m | 61.50 m | 56.51 m | ||||
| Hammer throw | 76.86 m | 74.08 m | 69.34 m | ||||
| Javelin throw | 70.53 m | 68.76 m | 65.36 m | ||||
| Decathlon | 7200 pts | 6704 pts | 6693 pts |
| 100 metres | 11.68 | 11.71 | 11.98 | ||||
| 200 metres | 24.01 | 24.47 | 24.48 | ||||
| 400 metres | 53.26 | 54.03 | 54.74 | ||||
| 800 metres | 2:04.14 | 2:04.50 | 2:04.53 | ||||
| 1500 metres | 4:17.62 | 4:21.65 | 4:24.56 | ||||
| 3000 metres | 9:04.36 | 9:14.13 | 9:35.69 | ||||
| 5000 metres | 16:31.65 | 16:55.54 | 17:03.75 | ||||
| 100 m hurdles | 13.45 | 13.55 | 13.61 | ||||
| 400 m hurdles | 58.43 | 58.89 | 58.92 | ||||
| 3000 m steeplechase | 10:21.54 | 10:28.24 | 10:38.30 | ||||
| 10,000 m walk | 45:20.59 | 45:24.35 | 47:38.46 | ||||
| 4 × 100 m relay | 45.06 | 45.95 | 47.00 | ||||
| 4 × 400 m relay | 3:38.20 | 3:41.11 | 3:45.16 | ||||
| High jump | 1.80 m | 1.78 m | 1.75 m | ||||
| Pole vault | 4.00 m | 3.60 m | 3.60 m | ||||
| Long jump | 6.44 m | 6.44 m | 5.92 m | ||||
| Triple jump | 13.22 m | 13.21 m | 13.09 m | ||||
| Shot put | 16.05 m | 15.54 m | 14.76 m | ||||
| Discus throw | 51.53 m | 51.17 m | 46.57 m | ||||
| Hammer throw | 64.81 m | 61.44 m | 55.46 m | ||||
| Javelin throw | 55.36 m | 54.16 m | 53.29 m | ||||
| Heptathlon | 5133 pts | 4925 pts | 4804 pts |