2018 Pan Pacific Swimming Championships – Mixed 4 × 100 metre medley relay
# 2018 Pan Pacific Swimming Championships – Mixed 4 × 100 metre medley relay

The mixed 4 × 100 metre medley relay competition at the 2018 Pan Pacific Swimming Championships took place on August 9 at the Tokyo Tatsumi International Swimming Center.

## Records

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

| World record | United States (USA) Matt Grevers (52.32) Lilly King (1:04.15) Caeleb Dressel (49.92) Simone Manuel (52.17) | 3:38.56 | Budapest, Hungary | 26 July 2017 |
| - | - | - | - | - |
| Pan Pacific Championships record | New event | New event | New event | New event |

## 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 9 August from 18:00.

| Rank | Lane | Nation | Swimmers | Time | Notes |
| - | - | - | - | - | - |
| | 3 | Australia | Mitch Larkin (53.08) Jake Packard (58.68) Emma McKeon (56.22) Cate Campbell (50.93) | 3:38.91 | CR, OC |
| | 6 | Japan | Ryosuke Irie (52.83) Yasuhiro Koseki (58.57) Rikako Ikee (55.53) Tomomi Aoki (54.05) | 3:40.98 | AS |
| | 4 | United States | Kathleen Baker (59.29) Michael Andrew (59.21) Caeleb Dressel (50.50) Simone Manuel (52.74) | 3:41.74 | |
| 4 | 5 | Canada | Danielle Hanus (1:01.12) Richard Funk (1:00.01) Josiah Binnema (51.56) Alexia Zevnik (54.06) | 3:46.75 | |
| 5 | 2 | Philippines | Chloe Isleta (1:04.44) Timothy Yen (1:07.61) Jarod Hatch (54.61) Nicole Oliva (57.54) | 4:04.20 | |
