| 2019 Keio Challenger | |
|---|---|
| Date | 25 February – 3 March (men's) 4 – 10 March (women's) |
| Edition | 14th (men's) 3rd (women's) |
| Category | ATP Challenger Tour ITF Women's World Tennis Tour |
| Surface | Hard |
| Location | Yokohama, Japan |
| Champions | |
| Men's singles | |
 Kwon Soon-woo | |
| Women's singles | |
 Greet Minnen | |
| Men's doubles | |
 Moez Echargui / Skander Mansouri | |
| Women's doubles | |
| Choi Ji-hee / Han Na-lae | |
The 2019 Keio Challenger was a professional tennis tournament played on hardcourts. It was the 14th (men's) and third (women's) editions of the tournament and part of the 2019 ATP Challenger Tour and the 2019 ITF Women's World Tennis Tour. It took place in Yokohama, Japan between 25 February and 10 March 2019.