The Type 90 Pneumatic Torpedo (九〇式空気式魚雷, designated for Imperial Japanese calendar year 2590) was a 61 cm (24 in)-diameter surface-fired torpedo used by the Imperial Japanese Navy during World War II.

It is an evolution of the 8th Year Type torpedo and was superseded by the Type 93 oxygen torpedo, commonly called the Long Lance, as oxygen generating equipment was installed aboard surface ships.

It was significantly faster (8–10 knots (15–19 km/h)), although it had a much shorter range (only 10,000 m (11,000 yd)) than the Japanese 6th and 8th Year torpedoes.

Twenty of these were bought with training warheads in 1926 for ¥30,000 each; the British allowed Japanese technicians to observe the manufacturing process and launch trials.

Its warhead weighed 400 kg (880 lb), its air chamber was pressurized at 220 bars (3,200 psi).