Japan had a hell of a time to deal with car exports in the US, SONY still won but the reaction to it was also extremely strong.
A Japanese company had absolutely no chance to go hit the US market and displace companies like SUN, Apple or IBM on the US soil. In particular software IP is a whole lot harder to fight for than manufacturing IP (even if it gets stolen, it's moot if it can't be physically applied. In software land reproduction is a given)
Europe wasn't much an easier target either. We saw that later with docomo failing miserably while having a clearly superior product.
In reverse the US has a long history of opening the Japanese market when they really want to, and forgoing that market isn't critical either, so there's quite an asymmetry.
The only ground Japanese company learned to properly fight has been video games so far.