Japheth Kimutai (born December 20, 1978, in Lelmokwo, Nandi District) is a Kenyan middle-distance runner who specialized in 800 metres.
In 1998 he won the gold medal at the Kuala Lumpur Commonwealth Games in a time of 1:43.82. In the same year he won the African Championships 800 metres in Dakar, Senegal. He finished fourth at the 1998 IAAF World Cup
In 1999 he won gold at the All-Africa Games.
In 2000 in Sydney for the Olympic Games Japheth failed to reach the final despite running the quickest time by a Kenyan in the games.
He had started his career brightly when in 1994 he won the silver medal at the World Junior Championships and then in 1997 when still a Junior set the World junior record in the 800 metres in a time of 1:43.64 in Zürich on August 13, 1997. The world junior record was beaten by Abubaker Kaki of Sudan in 2008.
|1994||World Junior Championships||Lisbon, Portugal||2nd||800m||1:48.22|
|—||4 × 400 m relay||DQ|
|1995||African Junior Championships||Bouaké, Ivory Coast||1st||800 m||1:47.67|
|1996||World Junior Championships||Sydney, Australia||4th||800m||1:48.97|
|8th||4 × 400 m relay||3:09.04|
|1998||African Championships||Dakar, Senegal||1st||800 m||1:45.82|
|Commonwealth Games||Kuala Lumpur, Malaysia||1st||800 m||1:43.82|
|1999||World Championships||Seville, Spain||5th||800 m||1:45.18|
|All-Africa Games||Johannesburg, South Africa||1st||800 m||1:44.91|
|2000||Olympic Games||Sydney, Australia||12th (sf)||800 m||1:45.64|
|2002||Commonwealth Games||Manchester, United Kingdom||5th||800 m||1:47.46|
|2003||World Championships||Paris, France||19th (sf)||800 m||1:47.53|