No, it's not a matter of magic cultural mojo. Japanese tech was ascendant for a long time in the 1970s and 1980s, and arguably even today beats the pants off American tech in many areas like automobiles (until Tesla came along, at least). And while Japan has adopted/had some American values rammed down its throat post-WW2, it remains very different culturally: there's very little in common between a Silicon Valley startup and a Japanese megacorp.