| Kai Kobayashi | |
| Birth Date: | 28 February 1993 |
| Birth Place: | Tokyo, Japan |
| Sport: | Track and field |
| Event: | Racewalking |
| Show-Medals: | yes |
is a Japanese racewalker.[1] He competed in the 50 kilometres walk event at the 2017 World Championships in Athletics in London, UK, placing third and receiving a bronze medal.[2]