The women's 400 metre freestyle competition at the 2018 Pan Pacific Swimming Championships took place on August 11 at the Tokyo Tatsumi International Swimming Center. The defending champion was Katie Ledecky of the United States.

Records Prior to this competition, the existing world and Pan Pacific records were as follows: World record3:56.46Rio de Janeiro, Brazil7 August 2016Pan Pacific Championships record3:58.37Gold Coast, Australia23 August 2014

Results All times are in minutes and seconds.

KEY:QAQualified A FinalQBQualified B FinalCRChampionships recordNRNational recordPBPersonal bestSBSeasonal best

Heats The first round was held on 11 August from 10:00.

Only two swimmers from each country may advance to the A or B final. If a country not qualify any swimmer to the A final, that same country may qualify up to three swimmers to the B final.

Rank Name Nationality Time Notes 1 Katie Ledecky 4:02.57 QA 2 Leah Smith 4:04.91 QA 3 Ariarne Titmus 4:06.47 QA 4 Allyson McHugh 4:08.72 QB 5 Madeleine Gough 4:09.09 QA 6 Kiah Melverton 4:10.07 QB 7 Emily Overholt 4:10.58 QA 8 Waka Kobori 4:10.78 QA 9 Katie Drabot 4:11.09 QB 10 Kennedy Goss 4:13.00 QA 11 Chihiro Igarashi 4:13.14 QA 12 Allison Schmitt 4:13.52 13 Mikkayla Sheridan 4:13.74 QB 14 Erica Sullivan 4:14.68 15 Zhang Ke 4:15.30 QB 16 Mackenzie Padington 4:16.27 QB 17 Yukimi Moriyama 4:18.80 QB 18 Nicole Oliva 4:21.80 QB 19 Rosalee Santa Ana 4:29.13 20 Gianna Garcia 4:50.44 21 Osisang Chilton 5:04.43 22 Mineri Gomez 5:14.32

B Final The B final was held on 11 August from 18:00. Rank Name Nationality Time Notes 9 Kiah Melverton 4:08.46 10 Allyson McHugh 4:09.08 11 Katie Drabot 4:11.09 12 Mikkayla Sheridan 4:11.94 13 Zhang Ke 4:12.43 14 Mackenzie Padington 4:13.97 15 Nicole Oliva 4:16.32 16 Yukimi Moriyama 4:19.00

A Final The A final was held on 11 August from 18:00. Rank Name Nationality Time Notes Katie Ledecky 3:58.50 Ariarne Titmus 3:59.66 OC Leah Smith 4:04.23 4 Madeleine Gough 4:08.42 5 Emily Overholt 4:08.81 6 Waka Kobori 4:09.04 7 Chihiro Igarashi 4:11.96 8 Kennedy Goss 4:13.25

References