How far back in time would we need to reach to create and perpetuate such a divide?
Can Japan develop in such a way that the Japonic languages and national self-identifications on each major island are at least as distinct from each other as the Norwegians, Swedes, Danes and Icelanders?
Can we perhaps alter the islands' history so much that even if Yamato Japanese eventually rule the archipelago, there are other nationalities/languages on the island at least as district from the Japanese as the Scots, Welsh and Irish are from the English?
Can Japan develop in such a way that the Japonic languages and national self-identifications on each major island are at least as distinct from each other as the Norwegians, Swedes, Danes and Icelanders?
Can we perhaps alter the islands' history so much that even if Yamato Japanese eventually rule the archipelago, there are other nationalities/languages on the island at least as district from the Japanese as the Scots, Welsh and Irish are from the English?