title: Naoki Kobayashi (sprinter)
text: # Naoki Kobayashi (sprinter)
  
  Naoki Kobayashi (小林 直己, Kobayashi Naoki, born 20 December 1990 in Hadano, Kanagawa) is a Japanese track and field sprinter who specialises in the 400 metres. His personal best in the event is 45.79 seconds. He competed in the 4 × 400 metres relay at the 2015 World Championships without qualifying for the final.
  
  ## Personal bests
  
  | Event | Time (s) | Competition | Venue | Date |
  | - | - | - | - | - |
  | 200 m | 20.97 (wind: 0.0 m/s) | Kanto University Championships | Yokohama, Japan | 24 May 2014 |
  | 300 m | 33.29 | Izumo Meet | Izumo, Japan | 20 April 2014 |
  | 400 m | 45.79 | Japan–China–Korea Friendship Meet | Jinhua, China | 6 July 2014 |
  
  ## International competition
  
  | Year | Competition | Venue | Position | Event | Time |
  | - | - | - | - | - | - |
  | Representing Japan ||||||
  | 2013 | East Asian Games | Tianjin, China | 3rd | 400 m | 46.76 |
  | 2013 | East Asian Games | Tianjin, China | 2nd | 4×400 m relay | 3:07.32 (relay leg: 2nd) |
  | 2015 | World Relays | Nassau, Bahamas | 17th (h) | 4×400 m relay | 3:06.38 (relay leg: 1st) SB |
  | 2015 | World Championships | Beijing, China | 15th (h) | 4×400 m relay | 3:02.97 (relay leg: 3rd) SB |
  | 2017 | World Relays | Nassau, Bahamas | — (h) | 4×400 m relay | DNF (relay leg: 3rd) |
  
  ## National titles
  
  | Year | Competition | Venue | Event | Time (s) |
  | - | - | - | - | - |
  | Representing Tokai University and Kanagawa (National Sports Festival only) |||||
  | 2014 | National University Individual Championships | Hiratsuka, kanagawa | 400 m | 47.11 |
  | 2015 | National Sports Festival | Wakayama, Wakayama | 400 m | 46.87 |
  