# 2010 Pan Pacific Swimming Championships – Men's 400 metre freestyle

The men's 400 metre freestyle competition at the 2010 Pan Pacific Swimming Championships took place on August 20 at the William Woollett Jr. Aquatics Center. The last champion was Park Tae-Hwan of South Korea.
This race consisted of eight lengths of the pool, with all eight being in the freestyle stroke.

## Records

Prior to this competition, the existing world and Pan Pacific records were as follows:
| World record | Paul Biedermann (GER) | 3:40.07 | Rome, Italy | July 26, 2009 |
| Pan Pacific Championships record | Ian Thorpe (AUS) | 3:41.83 | Sydney, Australia | August 22, 1999 |

## Results

All times are in minutes and seconds.
| KEY: | q | Fastest non-qualifiers | Q | Qualified | CR | Championships record | NR | National record | PB | Personal best | SB | Seasonal best |

### Heats

The first round was held on August 20, at 10:24.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 5 | 4 | Park Tae-Hwan | South Korea | 3:47.58 | QA |
| 2 | 4 | 4 | Zhang Lin | China | 3:47.80 | QA |
| 3 | 4 | 6 | Charlie Houchin | United States | 3:48.00 | QA |
| 4 | 3 | 5 | Peter Vanderkaay | United States | 3:48.39 | QA |
| 5 | 5 | 6 | Michael Klueh | United States | 3:48.85 | QA |
| 6 | 3 | 3 | Ryan Napoleon | Australia | 3:49.03 | QA |
| 7 | 4 | 2 | Ryan Cochrane | Canada | 3:49.69 | QA |
| 8 | 5 | 3 | Takeshi Matsuda | Japan | 3:49.89 | QA |
| 9 | 3 | 4 | Robert Hurley | Australia | 3:50.02 | QB |
| 10 | 3 | 6 | Chad La Tourette | United States | 3:50.61 | QB |
| 11 | 5 | 2 | Junpei Higashi | Japan | 3:50.82 | QB |
| 12 | 4 | 5 | Sho Uchida | Japan | 3:51.30 | QB |
| 13 | 3 | 2 | Thomas Fraser-Holmes | Australia | 3:52.14 | QB |
| 14 | 4 | 3 | Ahmed Mathlouthi | Tunisia | 3:53.42 | QB |
| 15 | 2 | 4 | Hassaan Khalik | Canada | 3:53.45 | QB |
| 16 | 1 | 3 | Kenrick Monk | Australia | 3:53.53 | QB |
| 17 | 3 | 7 | Mark Randall | South Africa | 3:53.81 | |
| 18 | 5 | 5 | Jean Basson | South Africa | 3:53.90 | |
| 19 | 5 | 1 | Sean Ryan | United States | 3:55.87 | |
| 20 | 4 | 7 | Sangjin Jang | South Korea | 3:56.27 | |
| 21 | 5 | 7 | Yohsuke Miyamoto | Japan | 3:56.62 | |
| 22 | 2 | 2 | Sean Penhale | Canada | 3:56.63 | |
| 23 | 2 | 6 | Juan Martin Pereyra | Argentina | 3:56.81 | |
| 24 | 3 | 8 | Blake Worsley | Canada | 3:57.47 | |
| 25 | 4 | 8 | Kier Maitland | Canada | 3:57.48 | |
| 26 | 1 | 5 | George O'Brien | Australia | 3:59.39 | |
| 27 | 3 | 1 | Lucas Kanieski | Brazil | 3:59.48 | |
| 28 | 2 | 1 | Yonghwan Kang | South Korea | 3:59.94 | |
| 29 | 2 | 3 | Sebastian Jahnsen | Peru | 4:00.26 | |
| 30 | 4 | 1 | Esteban Paz | Argentina | 4:00.36 | |
| 31 | 2 | 5 | Joonmo Bae | South Korea | 4:01.90 | |
| 32 | 2 | 7 | Leonardo Fim | Brazil | 4:03.74 | |
| 33 | 1 | 4 | Christopher Ashwood | Australia | 4:03.80 | |
| - | 5 | 8 | Stefan Hirniak | Canada | DNS | |

### B Final

The B final was held on August 20, at 18:22.
| Rank | Lane | Name | Nationality | Time |
| 9 | 4 | Michael Klueh | United States | 3:50.36 |
| 10 | 5 | Sho Uchida | Japan | 3:51.02 |
| 11 | 6 | Ahmed Mathlouthi | Tunisia | 3:51.37 |
| 12 | 1 | Jean Basson | South Africa | 3:51.38 |
| 13 | 3 | Thomas Fraser-Holmes | Australia | 3:51.61 |
| 14 | 7 | Mark Randall | South Africa | 3:51.70 |
| 15 | 8 | Sangjin Jang | South Korea | 3:55.96 |
| 16 | 2 | Hassaan Khalik | Canada | 3:58.15 |

### A Final

The A final was held on August 20, at 18:22.
| Rank | Lane | Name | Nationality | Time |
| | 4 | Park Tae-Hwan | South Korea | 3:44.73 |
| | 2 | Ryan Cochrane | Canada | 3:46.78 |
| | 5 | Zhang Lin | China | 3:46.91 |
| 4 | 6 | Peter Vanderkaay | United States | 3:47.11 |
| 5 | 3 | Charlie Houchin | United States | 3:47.98 |
| 6 | 7 | Takeshi Matsuda | Japan | 3:49.10 |
| 7 | 1 | Robert Hurley | Australia | 3:49.36 |
| 8 | 8 | Junpei Higashi | Japan | 3:51.90 |