"Clearly" you are, once again, out of your depth.
ETS 5.1 does support Japanese.
"Clearly the product does not yet exist in Japanese, which means NTT-Data has more than likely not even run anything on a Japanese computer"
Again, "Clearly" you've never dealt with a Japanese company.
You're wasting your time, but I guess it's yours to waste.
"Absence of evidence is not evidence of absence. - Carl Sagan