| K4Y | |
|---|---|
| |
| Role | Floatplane trainer |
| National origin | Japan |
| Manufacturer | Yokosuka Naval Air Technical Arsenal |
| First flight | 1930 |
| Introduction | 1933 |
| Primary user | Imperial Japanese Navy Air Service |
| Number built | 211 |
The Yokosuka K4Y (or Navy Type 90 Seaplane Trainer) was a Japanese floatplane trainer of the 1930s. A single engined two-seat biplane, 211 K4Ys were built between 1933 and 1940, serving as the Imperial Japanese Navy's basic floatplane trainer throughout the Second World War.