The Serbian international overcame David Goffin 6-3, 6-4 in one hour and 29 minutes on Saturday in the semis.
He will face John Millman in the finale on Sunday.
Here are the details.
Djoker has been in devastating form
The Serbian is competing in the Japan Open ATP 500 event for the first time.
He is trying to capture a 10th title on a tournament main draw debut.
The last time he did the same was in Eastbourne two years ago.
It has been a sweep through the draw for Djokovic, who has not dropped a set so far in four matches.
Millman downs Reilly Opelka in semis
Meanwhile, Australian Millman reached the ATP World Tour Final 2019 after winning here.
He beat Reilly Opelka 6-3, 7-6(4) to reach his first ATP 500 final.
"That was a pretty good match. It's always difficult playing against someone like Reilly, who has got such a massive serve. Managing to get through to play a final in Tokyo, that's pretty special for me." said Millman.
Djokovic shares his views after the victory
"The conditions are playing quick here. The surface doesn't bounce that much, so you've got to be very low and quick on return as well. It definitely was not easy when both of us were serving well," said Djokovic.
He's a very solid player, says Djoker on Millman
Djokovic, who has a 2-0 head-to-head record against Millman, is wary of the Aussie's threat.
"He's a very solid player," Djokovic said.
"I saw today that he had a very good, solid win against Opelka, who was in form and is never easy to play against because he has such a big serve. And Millman is someone that is fighting hard."