Japanese steel has low standards. Germany is superior as they have a much higher % of purity, better then USA. If I remember right, USA is 93%, Germany 98%. Part why their engines last forever.
When I was 20-ush I had a short job in a sheet metal mill, running a shear machine. The big 40k lb rolls.. We often got steel rolls from truck accidents, to straighten out the damaged , sometimes they got rained on and started rusting.
I’d run it through the shear to make sheets. Japan knowingly bought only the rusted metal to make Toyotas. American companies bought the clean stuff only, zero rust.
While they MAY make jobs, I question their product quality