Pakistan had their chances in the 60-minute duel, but things didn't happen their way, whereas Japanese were perfect in creating chances in Pakistan's citadel and in their defence too.
Playing Malaysia for a spot in the final, they went down 7-6 in a shoot-out after scores were 2-2 at the end of regulation time.
Defending champions India were beaten in sudden death after both teams were locked 2-2 in regulation time.
The Indian defenders looked completely out of sorts as they committed silly errors to allow Malaysia come back into the match after taking the lead twice.
The three-time gold medallist, ranked fifth in the world, stamped their dominance pumping seventy six goals in their five pool matches to top their group.
Four players scored hat-trick with as many as 10 Indians out of 18, who took the field, entering the scoresheet.
Dilpreet Singh, Simranjeet Singh and Mandeep Singh scored hat-tricks for the defending champions.