The men's 100 metre freestyle competition at the 2018 Pan Pacific Swimming Championships took place on August 10 at the Tokyo Tatsumi International Swimming Center. The defending champion was Cameron McEvoy of Australia.

Records Prior to this competition, the existing world and Pan Pacific records were as follows: World record46.91Rome, Italy30 July 2009Pan Pacific Championships record47.82Gold Coast, Australia22 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 10 August from 10:00.

Only two swimmers from each country may advance to the A or B final. If a country does 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 Zachary Apple 48.05 QA 2 Caeleb Dressel 48.13 QA 3 Blake Pieroni 48.21 QB 4 Kyle Chalmers 48.23 QA 5 Pedro Spajari 48.38 QA 6 Jack Cartwright 48.43 QA 7 Marcelo Chierighini 48.44 QA 8 Nathan Adrian 48.47 QB 9 Katsumi Nakamura 48.56 QA 10 Shinri Shioura 48.68 QA 11 Townley Haas 48.69 12 Gabriel Santos 48.72 QB 13 Alexander Graham 48.75 QB, 14 James Roberts 48.83 QB, 15 Andrew Seliskar 48.99 15 Katsuhiro Matsumoto 48.99 QB 17 Clyde Lewis 49.08 18 Yuri Kisil 49.16 QB 19 Marco Ferreira Júnior 49.23 QB 20 Juran Mizohata 49.51 QB 21 Javier Acevedo 49.70 QB, 22 Daniel Hunter 49.86 QB 23 Ruslan Gaziev 49.87 24 Reo Sakata 49.91 25 Will Pisani 50.05 26 Owen Daly 50.11 27 Yuki Kobori 50.12 28 Ippei Watanabe 50.18 29 Elijah Winnington 50.44 30 Grant Irvine 50.56 31 Liu Shaofeng 50.69 32 Rafael Barreto 53.10 33 Samir Al-Adawi 53.25 34 Noel Keane 55.94 NR 35 Armand Chan 56.05 36 Lennosuke Suzuki 57.73 37 Mark Imazu 1:00.30 Federico Grabich

B Final The B final was held on 10 August from 18:00. Rank Name Nationality Time Notes 9 Blake Pieroni 48.21 10 Nathan Adrian 48.32 11 Yuri Kisil 49.00 12 Gabriel Santos 49.24 13 Juran Mizohata 49.41 14 Katsuhiro Matsumoto 49.51 15 Marco Ferreira Júnior 49.60 16 Daniel Hunter 49.89

A Final The A final was held on 10 August from 18:00. Rank Name Nationality Time Notes Kyle Chalmers 48.00 Jack Cartwright 48.22 Caeleb Dressel 48.22 4 Marcelo Chierighini 48.36 5 Zachary Apple 48.47 6 Katsumi Nakamura 48.49 7 Pedro Spajari 48.51 8 Shinri Shioura 48.68

References