Nata Otoshi Geri
The player must perform → ↘ ↓ + attack/special. If done correctly, Ken will perform a swiping crescent kick. If the button is held, Ken will perform an Inazuma Kick, which is similar to his far-range held neutral attack and deals an impressive amount of shield damage.
Nata Otoshi Geri was introduced to Ken's moveset in the 1994 arcade game Super Street Fighter II Turbo. As updates to the original kept being made, new characters and new mechanics came with them. One of these new additions was attempts to differentiate Ryu and Ken, who were functionally identical except for minor attacks characteristics beforehand. this resulted in both getting exclusive moves. Ryu got moves like the Shakunetsu Hadoken and Ken got a suite of moves dubbed "Roundhouse" and "Crazy Kicks," with this move being one of them.