The Satoh ST-3220 is a utility tractor produced from 1978 to 1982 by Satoh. It features a Mitsubishi 1.5L 4-cylinder liquid-cooled diesel engine delivering 31.6 hp (23.6 kW). The tractor has a 15-speed transmission with 15 forward and 3 reverse gears and is two-wheel drive. It uses a JIS1 rear hitch and a 540 RPM rear PTO. The tractor weighs 2601 lbs (1179 kg). Variants include the ST3240 in 2WD and 4WD, and Mitsubishi-based D3250 and D3250FD models.