Columbia subject headings:
Austronesian languages--History.
Japanese language--History.
Harvard subject headings:
Austroasiatic languages--Grammar, Comparative--Japanese.
Austronesian languages--Grammar, Comparative--Japanese.
Japanese language--Etymology
Japanese language--Grammar, Comparative--Austroasiatic.
Japanese language--Grammar, Comparative--Austronesian.
Princeton subject headings:
Austronesian languages--History.
Japanese language--History.
Proto-Austro-Thai language--History.