The Game Awards are happening now and during a sizzle real for Xbox Game Pass they announced that Yakuza 3: Remastered, Yakuza 4: Remastered, Yakuza 5: Remastered and Yakuza 6 will be available soon on Gamepass for both Xbox and PC.
and with that, the entire Kiryu saga will be available on Gamepass. The only two that aren't available would be Yakuza: Like a Dragon which was just released about a month ago and the spinoff game Judgment.
Yakuza 3-5 will be available on January 28th 2021 and Yakuza 6 will be available on March 25th 2021. All of the games will be available for Xbox Game Pass, Windows 10 and Steam.