2018 Pan Pacific Swimming Championships – Men's 4 × 100 metre freestyle relay
# 2018 Pan Pacific Swimming Championships – Men's 4 × 100 metre freestyle relay

The men's 4 × 100 metre freestyle relay competition at the 2018 Pan Pacific Swimming Championships took place on August 11 at the Tokyo Tatsumi International Swimming Center. The defending champion was Australia.

## Records

Prior to this competition, the existing world and Pan Pacific records were as follows:

| World record | United States (USA) Michael Phelps (47.51) Garrett Weber-Gale (47.02) Cullen Jones (47.65) Jason Lezak (46.06) | 3:08.24 | Beijing, China | 11 August 2008 |
| - | - | - | - | - |
| Pan Pacific Championships record | United States (USA) Michael Phelps (48.13) Ryan Lochte (47.98) Jason Lezak (48.12) Nathan Adrian (47.51) | 3:11.74 | Irvine, United States | 20 August 2010 |

## Results

All times are in minutes and seconds.

| KEY: | CR | Championships record | NR | National record | PB | Personal best | SB | Seasonal best |
| - | - | - | - | - | - | - | - | - |

### Final

The final was held on 11 August from 18:00.

| Rank | Lane | Nation | Swimmers | Time | Notes |
| - | - | - | - | - | - |
| | 5 | Brazil | Gabriel Santos (48.93) Marcelo Chierighini (47.62) Marco Ferreira Júnior (48.53) Pedro Spajari (46.94) | 3:12.02 | |
| | 3 | Australia | Jack Cartwright (48.56) Alexander Graham (48.50) James Roberts (47.97) Kyle Chalmers (47.50) | 3:12.53 | |
| | 6 | Japan | Katsumi Nakamura (48.52) Shinri Shioura (48.19) Katsuhiro Matsumoto (47.61) Juran Mizohata (48.22) | 3:12.54 | AS |
| 4 | 2 | Canada | Markus Thormeyer (48.89) Yuri Kisil (48.02) Javier Acevedo (49.07) Ruslan Gaziev (48.52) | 3:14.50 | |
| 5 | 7 | Philippines | Rafael Barreto (53.19) Armand Chan (55.31) Timothy Yen (55.96) Jarod Hatch (52.55) | 3:37.01 | |
| – | 4 | United States | Caeleb Dressel (48.76) Blake Pieroni Zachary Apple Nathan Adrian | DSQ | |
