The Hurricane Kick (竜巻旋風脚, Tatsumaki Senpuukyaku, lit. "Tornado Whirlwind Leg") is a special move that is usable by Ken and others who follow his similar fighting style. Ken's has more hits and is more combo-able, but it can only knockdown on a midair opponent. If all hits are landed, Ken's version tends to be harder to punish. It's possible to use the midair version as a crossup since it also hits behind Ken.
Shippuu Jinraikyaku (疾風迅雷脚, lit. Hurricane Swift Thunder Leg) is a move where Ken delivers a low roundhouse kick, two high ones, and another low one, and follows up with a knee hit all while advancing to his opponent. He then launches into a vertical Tatsumaki Senpuukyaku if the knee strike succeeds. Originally a Level 3 Super in the Alpha/Zero series, this move is usually chosen by a lot of players through Street Fighter III where it's a low cost Super Art, and it makes a comeback in Street Fighter X Tekken where it sports lightning effects as a nod to its Japanese name.