Masako Chiba
- Born
- Jul 18, 1976 (50 years old)
- Birthplace
- Uji, Japan
- Events
- Marathon · Half Marathon
- Height
- 1.56 m
Masako Chiba (千葉 真子, Chiba Masako; born 18 July 1976 in Uji, Kyoto) is a Japanese long-distance runner, who won the bronze medal in 10,000 metres at the 1997 World Championships in Athens and in the marathon race at the 2003 World Championships in Paris. Chiba was a torchbearer during the 1998 Nagano Olympics Opening Ceremony.
Personal best · Marathon2:21:45
2006 season best2:48:58Aug 27, 2006 · Sapporo
Medals2World Championships: 2 bronze
Personal best · Half Marathon1:06:43
As of Oct 31, 2026: Marathon 2:21:45 (#189 all-time), Half Marathon 1:06:43 (#620 all-time), 2006 season best 2:48:58 (Aug 27, 2006, Sapporo (JPN)) · World Championships: 2 bronze · 50 years old
Personal bests
WA points calculator →Medals
| Competitions | Gold | Silver | Bronze | Total |
|---|---|---|---|---|
| World Championships | – | – | 2 | 2 |
Progression
| Season | Discipline | Result | Wind | Date | Competitions |
|---|---|---|---|---|---|
| 2006 | Marathon | 2:48:58 | – | Aug 27, 2006 | Sapporo (JPN) |
| 2005 | 10Kilometr | 32:27 | – | May 22, 2005 | Cleveland, OH (USA) |
| 2005 | Semi | 1:11:10 | – | Jul 3, 2005 | Sapporo (JPN) |
| 2005 | Marathon | 2:25:46 | – | Aug 28, 2005 | Sapporo (JPN) |
| 2004 | 10Kilometr | 31:51 | – | Aug 1, 2004 | Cape Elizabeth, ME (USA) |
| 2004 | 15Kilometr | 49:03 | – | Jul 11, 2004 | Utica, NY (USA) |
| 2004 | Semi | 1:10:55 | – | Sep 19, 2004 | Philadelphia, PA (USA) |
| 2004 | Marathon | 2:26:50 | – | Aug 29, 2004 | Sapporo (JPN) |