[Handball / Penalty Kick] A corner-kick decision overturned by VAR intervention for a handball against a defending player's arm

Watching the scene again, it can be seen that after the Nagoya player's header the ball strikes the right arm of the Okayama defending player. Even where it is certain that the ball has struck the arm, however, that alone does not make it a handball offence. The Laws of the Game state that not every touch of a player's hand/arm with the ball is an offence. What decides the matter is the way the arm is put out. In this scene, the right arm was used like a block, spread in a way that made the body unnaturally bigger. Judging from the way the arm was put out, the conclusion that this was a handball offence can be regarded as a reasonable one.