The Ghost of Tsushima is a PlayStation exclusive game and to be honest, we don’t really think it’ll come to PC anytime soon. Sony optimized this game for the PS4 console and hopefully for PS5 as well. But, Horizon Zero Dawn, another PlayStation exclusive game, will be soon available for PC. This happened only when Sony had another game aka Horizon Forbidden West ready for the PS5.
So we just have to wait a bit longer for this. There is no confirmed release date. That being said, “Sekiro: Shadows Die Twice” is another wonderful game if you want to experience same Japan and Samurai vibe.