2018 Pan Pacific Swimming Championships – Men's 100 metre backstroke

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

World record	Ryan Murphy (USA)	51.85	Rio de Janeiro, Brazil	13 August 2016
Pan Pacific Championships record	Matt Grevers (USA)	52.91	Gold Coast, Australia	21 August 2014

All times are in minutes and seconds.

Heats

The first round was held on 10 August from 10:00.^[3]

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.^[4]

Rank	Name	Nationality	Time	Notes
1	Ryan Murphy	United States	52.19	QA, CR
2	Matthew Grevers	United States	53.27	QA
3	Ryosuke Irie	Japan	53.68	QA
4	Michael Andrew	United States	53.69	QB
4	Justin Ress	United States	53.69	QB
6	Mitch Larkin	Australia	53.73	QA
7	Markus Thormeyer	Canada	53.88	QA
8	Jacob Pebley	United States	53.96
9	Javier Acevedo	Canada	54.13	QA
10	Austin Katz	United States	54.17
11	Masaki Kaneko	Japan	54.27	QA
12	Bradley Woodward	Australia	54.36	QA
13	Gabriel Fantoni	Brazil	54.40	QB
14	Wang Yutian	China	56.06	QB
15	Shunichi Nakao	Japan	56.12	QB
16	Josiah Binnema	Canada	56.53	QB, WD
17	Armand Chan	Philippines	1:02.98	QB
18	Noel Keane	Palau	1:06.71	QB, NR

B Final

The B final was held on 10 August from 18:00.^[5]

Rank	Name	Nationality	Time	Notes
9	Michael Andrew	United States	53.55
10	Justin Ress	United States	53.59
11	Gabriel Fantoni	Brazil	53.92
12	Shunichi Nakao	Japan	55.77
13	Wang Yutian	China	55.83
14	Armand Chan	Philippines	1:02.18
15	Noel Keane	Palau	1:06.49	NR

A Final

The A final was held on 10 August from 18:00.^[6]

Rank	Name	Nationality	Time	Notes
	Ryan Murphy	United States	51.94	CR
	Ryosuke Irie	Japan	52.78
	Mitch Larkin	Australia	52.88
4	Matthew Grevers	United States	52.99
5	Javier Acevedo	Canada	53.90
6	Markus Thormeyer	Canada	54.02
7	Masaki Kaneko	Japan	54.33
8	Bradley Woodward	Australia	54.34