Momo is a Japanese sounding rocket capable of delivering 20 kg to a height of 100 km. It is privately developed by Interstellar Technologies Inc. (IST). The single stage Momo is powered by a pressure-fed engine fueled with ethanol and liquid oxygen. The engine is gimbaled for steering, with cold gas thrusters providing roll control. Momo v0 was replaced by v1 in 2021.