Japan really has no presence in this business. Japanese automotive chip makers like Renesas had fabbed chips in-house, but decided to outsource everything to TSMC back in 2018. In fact, most automotive chip makers, such as Infineon and NXP also use TSMC -- the company has something like 70% of the market share.
Now, the real issue here is that the automotive chip business is fairly low-tech and low-margin business. TSMC has been around and has been making MCUs used in cars for a long time, but it seems others are less willing to jump in b/c it's going to take years to recoup their investment.
Canon is the other major vendor of chip lithography equipment, but I don’t know where their EUV processes are, or what the major chip manufacturing companies are in Japan that they would be sourcing for.
Using a simple example people understand they can't get consumer electronics like Xboxs, Playstations, and Switches because of the electronics shortage. People understand there is a car part shortage due to electronics. These aren't high information people talking to me about this. It's understood there's a chip shortage right now by the general population.
People are fine with and nobody really argues that America should support a steel industry. Frame the argument the same way and most people would be ok with supporting a technology infrastructure local to America.
The other issue that hasn't been touched on is that a chip subsidy will probably only benefit 1 or 2 states, where as agriculture and other commodity level subsidies get spread out so there's less political will to make it happen. (along with a zero sum attitude in politics that if X state is getting money it means my state is not getting that money)
It's actually a pretty critical geopolitical issue, sense there's a real chance that China makes a move on Taiwan soon (soon being within the next 10 years), which will result in either the destruction of alot of the chip infrastructure or China with global control over chip infrastructure.
I'm kinda surprised countries like Japan and Korea aren't making moves to address this by starting their own fabs. (Maybe there are?)