2018 Pan Pacific Swimming Championships – Women's 100 metre butterfly
# 2018 Pan Pacific Swimming Championships – Women's 100 metre butterfly

The women's 100 metre butterfly competition at the 2018 Pan Pacific Swimming Championships took place on August 11 at the Tokyo Tatsumi International Swimming Center. The defending champion was Alicia Coutts of Australia.

## Records

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

| World record | Sarah Sjöström (SWE) | 55.48 | Rio de Janeiro, Brazil | 7 August 2016 |
| - | - | - | - | - |
| Pan Pacific Championships record | Jessicah Schipper (AUS) | 57.30 | Victoria, Canada | 19 August 2006 |

## Results

All times are in minutes and seconds.

| KEY: | QA | Qualified A Final | QB | Qualified B Final | CR | Championships record | NR | National record | PB | Personal best | SB | Seasonal 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 | Rikako Ikee | Japan | 56.90 | QA, CR |
| 2 | Kelsi Dahlia | United States | 57.36 | QA |
| 3 | Emma McKeon | Australia | 57.99 | QA |
| 4 | Rebecca Smith | Canada | 58.13 | QA |
| 5 | Mallory Comerford | United States | 58.23 | QA |
| 6 | Katie McLaughlin | United States | 58.34 | QB |
| 7 | Brianna Throssell | Australia | 58.47 | QA |
| 8 | Regan Smith | United States | 58.59 | QB |
| 9 | Ai Soma | Japan | 58.70 | QA |
| 10 | Laura Taylor | Australia | 59.36 | QB |
| 11 | Yui Yamane | Japan | 59.41 | QB |
| 12 | Suzuka Hasegawa | Japan | 59.52 | QB |
| 13 | Sachi Mochida | Japan | 59.68 | |
| 14 | Danielle Hanus | Canada | 59.69 | QA |
| 15 | Mabel Zavaros | Canada | 1:00.34 | QB |
| 16 | Kyla Leibel | Canada | 1:01.54 | QB |
| 17 | Miranda Renner | Philippines | 1:06.32 | QB |
| 18 | Gianna Garcia | Philippines | 1:13.05 | |
| 19 | Mineri Gomez | Guam | 1:15.89 | |
| – | Madeline Groves | Australia | DNS | |

### B Final

The B final was held on 11 August from 18:00.

| Rank | Name | Nationality | Time |
| - | - | - | - |
| 9 | Katie McLaughlin | United States | 57.80 |
| 10 | Regan Smith | United States | 58.62 |
| 11 | Yui Yamane | Japan | 59.55 |
| 12 | Laura Taylor | Australia | 59.69 |
| 13 | Suzuka Hasegawa | Japan | 59.78 |
| 14 | Mabel Zavaros | Canada | 1:00.22 |
| 15 | Kyla Leibel | Canada | 1:00.75 |
| 16 | Miranda Renner | Philippines | 1:04.63 |

### A Final

The A final was held on 11 August from 18:00.

| Rank | Name | Nationality | Time | Notes |
| - | - | - | - | - |
| | Rikako Ikee | Japan | 56.08 | CR, NR |
| | Kelsi Dahlia | United States | 56.44 | |
| | Emma McKeon | Australia | 56.54 | |
| 4 | Rebecca Smith | Canada | 58.19 | |
| 5 | Mallory Comerford | United States | 58.25 | |
| 6 | Brianna Throssell | Australia | 58.80 | |
| 7 | Ai Soma | Japan | 58.87 | |
| 8 | Danielle Hanus | Canada | 59.19 | |
