aisan cultures do orders of 10 in groups of four instead of three.

so western is thousand, million, billion and so on, which are 10^3

east Asian is by 10^4, so the word for 10,000 is mahn in Korean, and 100,000 is 10 mahn and so on.

maybe the reason we have 100,000,000 sartoshis per BTC is because Satoshi was east Asian. 10^8 is much more natural in those cultures.