Given that the distance between Japan and Australia is only 6,848 km, I couldn’t help but wonder think about a hypothetical TL where Australia is colonized and established as a settler colony by Japan instead of Britain during the 17th-18th centuries. And similar to OTL, the following things happen:
1). Japanese settlers arrive in large numbers and many conflicts and massacres happen between settlers and the aborigines due to land disputes and other things(like with the British in OTL).
2). Japanese settlers infect aborigines with smallpox, measles, and tuberculosis which results in our near extinction(like in OTL).
3). Australia becomes a majority-Yamato continent and its society and culture are modeled after that of Japan’s.
I’m imagining a scenario similar to the Japanese colonization of Hokkaido.