Victory over Camila Giorgi in Saturday's semifinal extended Naomi Osaka's winning streak to 10 matches, following her US Open success earlier this month.
Karolina Pliskova became the fifth player this season to register 40 main draw match wins with her victory over Donna Vekic in the last four.
Naomi Osaka has yet to drop a set at this week's tournament, whereas Karolina Pliskova has been taken the distance in all three of her matches.
Karolina Pliskova is playing her first WTA final since the clay-court season.
Naomi Osaka and Karolina Pliskova are level at a win apiece from previous meetings. The Japanese prevailed at Indian Wells this year following Pliskova's victory in Toronto last year.
Karolina Pliskova is bidding for her second title of 2018, to go with her Stuttgart success, while Naomi Osaka has previously won at Indian Wells and the US Open this year.
The last home player to win the tournament was Kimiko Date, who beat Lindsay Davenport in straight sets in 1995.
Karolina Pliskova is playing in her first Tokyo final, whereas Naomi Osaka previously made the finale two years ago, losing out to Caroline Wozniacki.
Naomi Osaka has already beaten one Czech player en route to the final, overcoming Barbora Strycova in the last eight.
Petra Kvitova was the last Czech player to taste success in Tokyo, defeating Angelique Kerber in 2013.
The last four Tokyo finals have all been decided in straight sets.
ORDER OF PLAY
Play starts at 11am
 Naomi OSAKA (JPN) v Karolina PLISKOVA (CZE)