It was selected in April 1929 as the Navy Type 3 Carrier Fighter, with the short designation A1N1.

The Adrian helmet was replaced by the Navy Type 2 and later the Type 3.

The earlier E7K1 was renamed to Navy Type 94 Reconnaissance Seaplane Model 1.

The first of these flew on 14 July 1936 and was originally designated Navy Type 97 Flying Boat, later H6K.

- formal (long) navy designation Navy Type 13-2 Carrier Attack Aircraft.

Long Navy designation Navy Type 13-3 Carrier Attack Aircraft.

The 1MT1N flew for the first time in August 1922 and it entered service as the Navy Type 10 Torpedo Bomber.

(Also called Navy Type 15)

The first K3M2 production version entered service in 1932 as the Navy Type 90 Crew Trainer.

The Navy Type 90 Crew Trainer was primarily a land-based aircraft; however, a few were converted with floats for use as seaplanes.