JAPAN
Map of pre-1945 distribution of Ainu languages and dialects. Coastline adapted from OpenStreetMap Sources: Fukazawa, Mika. Hokkaido Ainu Dialects: Variation from the Perspective of the Geographical Distribution of Vocabulary (2018)
By Noahedits – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=87101552