Work intensely for 15–20 years. Build a rare combination. Exit the grind by 36–41. This is the map.
You said you want to "build as many possibilities as possible." That instinct is understandable — but it's also how people stay busy for 15 years without accumulating anything.
The math only works if you hit income inflection points. That requires depth in a few things, not surface in everything. Your Japan + data combo is the lane. Go deep in it. Let everything else be optional extras, not the core strategy.