[blam]

"Might have its origins from the Hakka people as well. "

Not likely. The Hakkas (the guests) made a centuries long migration from north to south China. During that migration any of them with Caucasian features was executed. (for being barbarian)

[muawiyah]

The Hakka were apparantly the first barbarians to challenge Chinese power in the North. The first emperor (Qin) built the Great Wall to keep them out.

Supposedly he killed all those with a large or high nose, and as a result the only surviving Hakka had short noses. This is an unsustainable Lamarckian view of inheritance.

The fact is the Hakka tend to not have a high bridge. Numerous Japanese people today, including many members of the Royal Family group do not have a high bridge. Many Ainu and those descended from Samurai do not have a high bridge.

Whatever happened to the Hakka who went from North to South is irrelevant to what happened to the Hakka who went to Japan "way back when".