| Designation |
Manufacturer |
Official Name |
Description |
| H1H1/H1H3 |
Hiro |
Navy Type 15 Flying-Boat |
Twin-engined biplane; obsolete in 1941 |
| H2H1 |
Hiro |
Navy Type 89 Flying-Boat |
Twin-engined biplane; obsolete in 1941 |
| H3H1 |
Hiro |
Navy Type 90-1 Flying-Boat |
Three-engined monoplane; obsolete in 1941 |
| H3K1/H3K2 |
Kawanishi |
Navy Type 90-2 Flying-Boat |
Three-engined biplane; obsolete in 1941 |
| H4H1/H4H2 |
Hiro |
Navy Type 91 Flying-Boat |
Twin-engined monoplane; obsolete in 1941 |
| H5Y1/H5Y2 |
Yokosuka |
Navy Type 99 Flying-Boat |
|
| H6K1/H6K5 |
Kawanishi |
Navy Type 97 Flying-Boat |
|
| H6K2-L/H6K4-L |
Kawanishi |
Navy Type 97 Transport Flying-Boat |
|
| H7Y1 |
Yokosuka |
Navy Experimental 12-Shi Special Flying-Boat |
Project only |
| H8K1/H8K4 |
Kawanishi |
Navy Type 2 Flying-Boat |
|
| H8K2-L |
Kawanishi |
Navy Transport Flying-Boat Seiku |
|
| H9A1 |
Aichi |
Navy Type 2 Training Flying-Boat |
|
| H10H1 |
Hiro |
Navy Experimental 14-Shi Medium Flying-Boat |
Project only |
| H11K1-L |
Kawanishi |
Navy Experimental Large-size Transport Flying-Boat Soku |
Projected four-engined transport flying-boat with clamshell loading
doors in the nose |
| HXC1 |
Consolidated |
Navy Experimental Type C Flying-Boat (Consolidated P2Y-1) |
One aircraft tested |
| HXD1 |
Douglas |
Navy Experimental Type D Flying-Boat (Douglas DF) |
Two aircraft tested; |
