Namban Marathon PBs
| NAME | M / F | Time | Race | Year | Age |
| David Voltas | m | 2:29:43 | Tokyo | 2019 | 28 |
| Brett Larner | m | 02:34:43 | Beppu-Oita | 2006 | 32 |
| Yuichiro Mizukami | m | 02:37:30 | Wakashio | 1987 | 17 |
| Ryudo Tsukizaki | m | 02:38:16 | Tokyo | 2018 | 33 |
| George Nicholson | m | 02:40:55 | Boston | 2000 | 31 |
| Harrisson Uk | m | 02:42:31 | Koga | 2018 | 34 |
| Mike Trees | m | 02:43:49 | Okinawa | 2009 | 47 |
| Chris Winter | m | 02:43:50 | Nagano | 2015 | 26 |
| Bob Poulson | m | 02:44:48 | Kawaguchi-ko | A few years back | 37 |
| Mike Hegarty | m | 02:46:16 | Oxford | 2010 | 30 |
| Niall Murtagh | m | 02:46:30 | Sydney | 1982 | 26 |
| Olivier Absous | m | 02:47:59 | Shonan | 2011 | 34 |
| Stan Chow | m | 2:48:10 | Seoul | 2019 | |
| Yuki Fukushima | m | 02:48:41 | Beppu_Oita | 2019 | 34 |
| Martin Verdier | m | 2:50:05 | Shizuoka | 2019 | 44 |
| Francesco Frova | m | 02:50:57 | Katsuta, Ibaraki | 2018 | 33 |
| Jon Holmes | m | 02:51:22 | Melbourne | 1988 | 36 |
| Gildas Tuffin | m | 2:53:01 | Shonan | 2018 | 41 |
| Eric Guinard | m | 02:53:42 | Kakogawa | 2016 | 48 |
| Daigo Asada | m | 2:54:32 | Itabashi | 2019 | 42 |
| Steve Lacey | m | 02:54:43 | Ohtawara | 2005 | 42 |
| David Abbott | m | 02:54:45 | Osaka | 2017 | 36 |
| Brett Whiteoak | m | 02:54:50 | London | 2002 | 42 |
| Colin Fulton | m | 02:55:20 | Ohtawara | 2002 | 48 |
| Paddy O'Connor | m | 02:55:48 | Ohtawara | 2008 | 34 |
| Dennis Büchner | m | 2:55:50 | Hamburg | 2018 | 36 |
| Anna Novick | f | 02:56:23 | Boston | 2013 | 24 |
| Colin Hickey | m | 02:56:50 | Nagano | 2016 | 36 |
| Renaud Isman | m | 2:57:07 | Tsukuba | 2017 | 48 |
| Eric Lebrasseur | m | 02:57:26 | Koga | 2018 | 46 |
| Mark Shrosbree | m | 2:57:36 | Shonan | 2018 | 57 |
| Derek Leong | m | 02:57:46 | Betsudai | 2015 | 33 |
| Satoshi Hashimoto | m | 02:58:40 | Kobe | 2015 | 44 |
| Emmanuel Obser | m | 2:58:46 | Koga Hanamomo | 2019 | 44 |
| Paul Allen | m | 2:59:43 | Tokyo | 2019 | |
| Romain Demare | m | 2:59:48 | Koga Hanamomo | 2019 | 33 |
| Yannick Bethegnies | m | 03:00:03 | Tokyo | 2015 | 38 |
| Alan Cannon | m | 03:02:40 | Tokyo | 2018 | 49 |
| Nizar Grira | m | 03:04:42 | Koga Hanamomo | 2017 | 38 |
| Gordon Knight | m | 03:06:20 | Adelaide | 2016 | 46 |
| Yuichi Kanamori | m | 03:06:22 | Nagano | 2017 | 48 |
| Charles Boisson | m | 03:07:09 | Tsukuba | 2017 | 43 |
| David Rubenstein | m | 03:08:49 | Tokyo | 2007 | 39 |
| Mika Tokairin | f | 03:08:50 | Tokyo | 2008 | 41 |
| Carol Cunningham | f | 03:09:49 | Christchurch | 2010 | 32 |
| Yosuke Kimura | m | 3:09:53 | Koga Hanamomo | 2018 | |
| Max Streeter | m | 3:10:56 | Shizuoka | 2019 | |
| Taro Oguchi | m | 03:11:13 | Tokyo | 2014 | 33 |
| Faith Geraghty | f | 3:11:17 | Tokyo | 2016 | 36 |
| Frank Harrison | m | 03:11:40 | Itabashi | 2018 | 36 |
| Lloyd Parker-Wilson | m | 03:11:57 | Tokyo | 2016 | 29 |
| Erik Swedberg | m | 03:11:58 | California International | 2017 | 31 |
| David Sweet | m | 03:12:17 | Paris | 2015 | 46 |
| Eliza Swedberg | f | 3:13:06 | Okhotsk Abashiri | 2018 | 35 |
| Tim Williams | m | 03:13:32 | Brighton | 2018 | 46 |
| Taeko Hara | f | 03:14:46 | Tsukuba | 1994 | 40 |
| Rika Homma | f | 3:16:18 | Berlin | 2018 | 39 |
| Padraig MacColgain | m | 03:16:40 | Ohtawara | 2015 | 47 |
| Kota Torii | m | 03:16:51 | Koga | 2016 | 29 |
| Satohi Numasawa | f | 03:17:19 | Tokyo | 2010 | N/A |
| Gareth Evans | m | 03:18:16 | Shonan | 2017 | 40 |
| Rieko Trees | f | 03:19:08 | Nagoya | 2017 | 39 |
| Tony Collins | m | 3:20:25 | Berlin | 2018 | 49 |
| Emily Furuichi | f | 03:21:39 | Osaka | 2017 | 23 |
| Mike Rayner | m | 03:21:45 | Tokyo | 2015 | 51 |
| Mika Kume | f | 03:22:50 | Chiba | 2000 | 39 |
| Tim Barnstable | m | 03:26:51 | Yokohama | 2018 | 45 |
| Quoc Nguyen Kien | m | 3:29:?? | Tokyo | 2019 | 37 |
| Yukari Oimatsu | f | 03:35:21 | Tottori | 2016 | 48 |
| Katsunori Kinoshita | m | 03:35:22 | Tokyo | 2013 | 43 |
| Yasuo Hayakawa | m | 3:36:25 | Nagano | 2019 | 59 |
| Ben Dyer | m | 03:41:13 | Shonan | 2017 | 37 |
| Ken Pechter | m | 3:41:30 | Tokyo | 2017 | 52 |
| Gary Chandler | m | 03:42:00 | Arakawa | 2006 | 37 |
| Matthew Holmes | m | 03:43:23 | Tsukuba | 2017 | 39 |
| Yumiko Kato | f | 3:44:32 | Tokyo | 2014 | |
| Tamami Holmes | f | 03:47:31 | Tokyo | 2010 | 50 |
| Andrew Farmer | m | 3:51:24 | Tateyama Wakashio | 2019 | 42 |
| Jesper Edman | m | 03:51:57 | Stockholm | 2018 | 43 |
| Tom Taaffe | m | 3:53:22 | Tokyo | 2019 | |
| Yuko Takamuki | f | 3:54:16 | Toyama | 2018 | |
| Marek Behr | m | 03:55:23 | Düsseldorf | 2018 | 52 |
| Glenn Rubin | m | 3:56:09 | Koga Hanamomo | 2019 | 50 |
| Kiran Thomas | m | 03:57:30 | Kyoto | 2018 | 38 |
| Yoshie Niitsuma | f | 04:05:49 | New York City | 2011 | N/A |
| SeungGi Hong | f | 04:16:05 | Seoul | 2019 | 36 |
| Marcus Kosins Jr. | m | 04:25:27 | Honolulu | 2017 | 59 |
| Daniel Seite | m | 04:57:00 | Tokyo | 2009 | 44 |
