that pretty much sums up fighting games in general: timing. once you get timing down things become quite simple, but actually getting the timing down...
yeah the timing is reletivly strict. from what i can tell in order to pass through you have to be in the part of the animation where haku is leaning...
You know i've played as Hakumen for a while so i feel kinda noobish for just discovering this, but did you know you can go through jin's projectiles...