Japan had defeated the unified Korean team 3-nil in the semi-final at the International Table Tennis Federation World Championships in Halmstad.
The Japanese will face China in the final after the defending champions recovered from a match down to beat Hong Kong 3-1.
North and South Korean players refused to play their quarter-final clash yesterday and instead joined forces in a move hailed as an example of peace through sport, even though it was controversial with some due to the rule changes mid-competition.
The Koreans are therefore guaranteed two bronze medals for reaching the semi-final.
Defending Champions China suffered a shock in the opening match of their semi-final when reigning world and Olympic singles champion Ding Ning lost 11-6, 11-7, 11-6 to Hong Kong's Minnie Soo.
Normality resumed thereafter, however, as China close in on a fourth successive title.
China also eased into the men's semi-finals today with a 3-0 victory over Austria.
South Korea partially avenged Japan for the women's defeat with a 3-1 men's success.
It will mark the first time at the biennial event since a 2006 event in Bremen where Japan have failed to finish in a podium position.
Hosts Sweden beat England 3-0 and Germany won 3-1 over Brazil in the other two quarter-finals