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

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

World record	Adam Peaty (GBR)	57.10	Glasgow, United Kingdom	4 August 2018
Pan Pacific Championships record	Kosuke Kitajima (JPN)	59.04	Irvine, United States	19 August 2010

All times are in minutes and seconds.

Heats

The first round was held on 9 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	Andrew Wilson	United States	59.42	QA
2	Wang Lizhuo	China	59.50	QA
3	Michael Andrew	United States	59.55	QA
4	Yasuhiro Koseki	Japan	59.67	QA
5	João Gomes Júnior	Brazil	59.74	QA
6	Jake Packard	Australia	59.81	QA
7	Matthew Wilson	Australia	59.90	QA
8	Josh Prenot	United States	1:00.22	QB
9	Zac Stubblety-Cook	Australia	1:00.32	QB
10	Richard Funk	Canada	1:00.33	QA
11	Ippei Watanabe	Japan	1:00.35	QB
12	Eli Wall	Canada	1:01.65	QB
13	Song Jiale	China	1:02.13	QB
14	Liu Yunsong	China	1:02.69	QB
15	Timothy Yen	Philippines	1:07.05	QB
16	Lennosuke Suzuki	Northern Mariana Islands	1:17.36	QB

B Final

The B final was held on 9 August from 17:30.^[5]

Rank	Name	Nationality	Time	Notes
9	Zac Stubblety-Cook	Australia	1:00.20
10	Ippei Watanabe	Japan	1:00.49
11	Josh Prenot	United States	1:00.63
12	Song Jiale	China	1:01.52
13	Liu Yunsong	China	1:01.97
14	Eli Wall	Canada	1:02.03
15	Timothy Yen	Philippines	1:08.55
16	Lennosuke Suzuki	Northern Mariana Islands	1:16.51

A Final

The A final was held on 9 August from 17:30.^[6]

Rank	Name	Nationality	Time	Notes
	Yasuhiro Koseki	Japan	59.08
	Jake Packard	Australia	59.20
	João Gomes Júnior	Brazil	59.60
4	Andrew Wilson	United States	59.70
5	Wang Lizhuo	China	59.76
6	Matthew Wilson	Australia	59.83
7	Michael Andrew	United States	1:00.04
8	Richard Funk	Canada	1:00.62