John Batchelor 
Ainu-English-Japanese Dictionary [PDF ebook] 
Including a Grammar of the Ainu Language

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. As the work was printed by a Japanese firm at Tokyo, nearly a thousand miles from the writer’s home in Sapporo, the table of errata will be found to be considerably larger than it would have been had he been in a position to see the proofs oftener. This must be the excuse for so long a list, for which, also, every apology is made. The errata belonging to the Dictionary part will be found at the end of the Dictionary, while those appertaining to the Gram mar will be found at the end of the book.