@book{2007xtheoriginofjapaneseandainucomparativelingui,
  title = {日本語とアイヌ語の起源 = The origin of Japanese and Ainu : comparative linguistics},
  author = {日出志 鳴海},
  year = {2007},
  url = {https://ci.nii.ac.jp/ncid/BA83183761}
}