| Competition | 2018 Pan Pacific Swimming Championships | 
|---|---|
| Venue | 
Tokyo
 | 
| Held | 11 August 2018 | 
| Status | Medal | 
| Competitors | 18 | 
| Countries | 9 | 
| Pos | Athlete(s) | Country | Preliminary Round | Final | ||
|---|---|---|---|---|---|---|
| 🥇 | Chase Kalisz | 1:57.07 (1 h1)  | 
1:55.40 (1 FA)  | 
|||
| 🥈 | Mitch Larkin | 1:59.48 (7 h1)  | 
1:56.21 (2 FA)  | 
|||
| 🥉 | Kosuke Hagino | 1:57.60 (2 h1)  | 
1:56.66 (3 FA)  | 
|||
| 4 | Daiya Seto | 1:58.50 (5 h1)  | 
1:57.36 (4 FA)  | 
|||
| 5 | Abrahm DeVine | 1:58.45 (3 h1)  | 
1:57.81 (5 FA)  | 
|||
| 6 | Clyde Lewis | 1:58.47 (4 h1)  | 
1:58.17 (6 FA)  | 
|||
| 7 | Leonardo Coelho Santos | 2:00.25 (9 h1)  | 
1:58.83 (7 FA)  | 
|||
| 8 | Lewis Clareburt | 2:00.92 (10 h1)  | 
1:59.31 (8 FA)  | 
|||
| 9 | Jay Litherland | 1:59.91 (8 h1)  | 
1:59.88 (1 FB)  | 
|||
| 10 | Hiromasa Fujimori | 1:58.78 (6 h1)  | 
1:59.96 (2 FB)  | 
|||
| 11 | Mack Darragh | 2:01.72 (13 h1)  | 
2:00.94 (3 FB)  | 
|||
| 12 | Brandonn Almeida | 2:01.20 (11 h1)  | 
2:01.34 (4 FB)  | 
|||
| 13 | Deng Ziqi | 2:02.51 (15 h1)  | 
2:04.26 (5 FB)  | 
|||
| 14 | Lennosuke Suzuki | 2:27.07 (17 h1)  | 
2:25.64 (6 FB)  | 
|||
| 15 | Javier Acevedo | 2:01.79 (14 h1)  | 
— (AC FB)  | 
* | ||
| 16 | Juran Mizohata | 2:01.57 (12 h1)  | 
— | |||
| 17 | Jonathan Gómez | 2:07.42 (16 h1)  | 
— | |||
| 18 | Andrew Seliskar | — (AC h1)  | 
— | * | ||
| DNS | Caeleb DresselDNS | — (DNS h1)  | 
— | |||
| DNS | Jarod HatchDNS | — (DNS h1)  | 
— | |||
| DNS | VinÃcius LanzaDNS | — (DNS h1)  | 
— | 
| Pos | Athlete(s) | Country | Mark | |
|---|---|---|---|---|
| 1 | Chase Kalisz | 1:57.07 | ||
| 2 | Kosuke Hagino | 1:57.60 | ||
| 3 | Abrahm DeVine | 1:58.45 | ||
| 4 | Clyde Lewis | 1:58.47 | ||
| 5 | Daiya Seto | 1:58.50 | ||
| 6 | Hiromasa Fujimori | 1:58.78 | ||
| 7 | Mitch Larkin | 1:59.48 | ||
| 8 | Jay Litherland | 1:59.91 | ||
| 9 | Leonardo Coelho Santos | 2:00.25 | ||
| 10 | Lewis Clareburt | 2:00.92 | ||
| 11 | Brandonn Almeida | 2:01.20 | ||
| 12 | Juran Mizohata | 2:01.57 | ||
| 13 | Mack Darragh | 2:01.72 | ||
| 14 | Javier Acevedo | 2:01.79 | ||
| 15 | Deng Ziqi | 2:02.51 | ||
| 16 | Jonathan Gómez | 2:07.42 | ||
| 17 | Lennosuke Suzuki | 2:27.07 | ||
| AC | Andrew Seliskar | — | ||
| DNS | Caeleb DresselDNS | — | ||
| DNS | Jarod HatchDNS | — | ||
| DNS | VinÃcius LanzaDNS | — | 
| Pos | Athlete(s) | Country | Mark | |
|---|---|---|---|---|
| 1 | Chase Kalisz | 1:55.40 | ||
| 2 | Mitch Larkin | 1:56.21 | ||
| 3 | Kosuke Hagino | 1:56.66 | ||
| 4 | Daiya Seto | 1:57.36 | ||
| 5 | Abrahm DeVine | 1:57.81 | ||
| 6 | Clyde Lewis | 1:58.17 | ||
| 7 | Leonardo Coelho Santos | 1:58.83 | ||
| 8 | Lewis Clareburt | 1:59.31 | 
| Pos | Athlete(s) | Country | Mark | |
|---|---|---|---|---|
| 1 | Jay Litherland | 1:59.88 | ||
| 2 | Hiromasa Fujimori | 1:59.96 | ||
| 3 | Mack Darragh | 2:00.94 | ||
| 4 | Brandonn Almeida | 2:01.34 | ||
| 5 | Deng Ziqi | 2:04.26 | ||
| 6 | Lennosuke Suzuki | 2:25.64 | ||
| AC | Javier Acevedo | — |