A2N1
(Navy Type 90-I Carrier-based fighter) - Guns located in both sides of the nose, but few produced.

A2N2
(Navy Type 90-II Carrier-based fighter) - Guns transferred to the upper surface of the nose, the fuel tanks mounted on the fuselage sides.

A2N3
(Navy Type 90-III Carrier-based fighter) - principal production variant.
5° of dihedral on upper mainplane.

A3N3-1
two-seat trainer
A2N1
(Navy Type 90-I Carrier-based fighter) - Guns located in both sides of the nose, but few produced.
A2N2
(Navy Type 90-II Carrier-based fighter) - Guns transferred to the upper surface of the nose, the fuel tanks mounted on the fuselage sides.
A2N3
(Navy Type 90-III Carrier-based fighter) - principal production variant. 5° of dihedral on upper mainplane.
A3N3-1
two-seat trainer
Nakajima A2N