The Zaibatsu/Keiretsu took many generations to get where they are now, and relied on heavy political patronage and financial muscle to grow over protracted peri

The Zaibatsu/Keiretsu took many generations to get where they are now, and relied on heavy political patronage and financial muscle to grow over protracted periods of time. None of their founders built multiple global businesses from scratch in a single lifetime, let alone simultaneously. They're also very much artificial constructs, in the sense at this point they are as much political as economic artefacts. The Chaebol are more recent in their modern form but followed the same model.