Yakuza 6, originally a PS4 exclusive, is heading to PC and Xbox Game Pass in March 2021 internationally. So is the Yakuza Remastered Collection, which includes former PlayStation exclusives, Yakuza 3, 4, and 5. Sega says it currently has no plans to make similar announcements for Japan.
Update - 1/7/20 4:27AM: A spokesperson for the Yakuza series tells Kotaku, “The Yakuza Remastered Collection is coming out on January 28, 2021, and moreover, it’s been confirmed that Yakuza6: The Song of Life is also launching on March 25, 2021! Both can be purchased from Japan, and it has the Japanese voice-over as the original version.” More details here.