It's all only a matter of time, though I admit I wish it was all faster.
I'm rather puzzled why SEGA hasn't yet announced PC ports for Yakuza 3, 4 and 5, considering they've already decided upon the release dates for the PS4 version, and from what I gather porting the games over from the PS4 is trivial (relatively speaking).
Japan doesn't really have a PC gaming market
PC gaming in Japan used to be all about hardcore otaku pandering during the past 20 years, which translates to 18+ visual novels and other games with an emphasis on the porn content. I remember reading about a Western tourist walking into a Japanese video game shop, asking for the PC section and then quickly making an exit when he discovered it was all adult VNs.
Then again, there used to be a big hobbyist scene surrounding the PC-88, its derivatives and successors, though even that started with amateurs making adult games, and only later did more professionally made games come to the market. The PC-88 and PC-98 library of games numbers in the thousands, and most are completely unknown to Western audiences. Falcom, as an example, started as a developer for the PC-88.
Hell, the PC-98 was alive and kicking up to the mid-nineties, until Windows 95 siphoned support away from it.
As an interesting side note, and as a prime example of shameless corporate greed, Japanese Steam users usually have to buy a gore DLC that can cost upwards of $20 dollars on top of the base game if they want to enjoy the "full experience", mostly because the Japanese rating board is the retarded cousin of the Western ones, only that they get butthurt over "excessive" violence, but aren't much phased by lewd content (or what would be considered lewd in the West).