| 1982 Kosuke Kitajima is born in Tokyo. |
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| 1987 He begins swimming at the age of five. |
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| 2000 In his last year of high school, Kitajima makes his Olympic debut at the Sydney Olympics. |
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| 2004 Kitajima earns two gold medals in the 100-meter and 200-meter at the Athens Olympics. |
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| 2007 Kitajima receives a gold medal at the World Championships, and goes on to win first place in the 200-meter while retaining his 8th consecutive championship in the 100-meter at the Japanese Championships. |
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| 2008 The Beijing Olympics will be held. Kitajima hopes to become the first to receive consecutive gold medals in competitive swimming. |
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| Kitajima currently has a contract with Coca-Cola Japan. |