From Tekkenpedia

Lightning Uppercut
Command	b+1+4
Stance
Damage	40
Hit Range	!
Properties	KND
Move Frames		Hit Advantage
43		KD
Block Advantage		CH Advantage
KD		KD

Lightning Uppercut, also called called Lightning Godfist, is an unblockable move introduced in Tekken 2 that can be performed by Kazuya Mishima, Devil Jin and Jin Kazama (T3 and TTT only). During the animation of this move, electricity surrounds the character and the character does a single clockwise spiral and uses the momentum to perform a leaping left-handed punch. The Lightning Uppercut also has a stronger, yet slower version known as the Lightning Screw Uppercut.