Dictionaries and Helpful Lookups
Oxford NINJAL Corpus of Old Japanese (ONCOJ)
A short list of useful Old Japanese words
Translations of waka poetry with the original text and transliteration
A huge page. Be patient and let it load.
Sources of Nara-Period Names
Tagomoro Hiroshi. “Women’s names in Ancient ‘Izumo-no-kuni’ | 古代出雲国の女性名について.” Published on 3-31-2015 in 島大言語文化 : 島根大学法文学部紀要言語文化学科編.
A remarkable list of female names drawn from 8th-century documents from Izumo Province, with a table of the kanji used phonetically rather than for meaning.
Thinking of Japanese Names | 日本の名前について考える 尽鏑社
A rich vein of research done by Soga Seiga, an amateur onomast.
Continuation of the Chronicles of Japan | 續日本紀
A history of Japan written in 797 CE. Contains the names of hundreds, if not thousands, of men from the Japanese aristocracy, as well as occasional women and lower-class men. Although written mostly in ancient Chinese, this copy has been corrected to modern Chinese thoroughly enough that Google translate works well on it. Note that the characters have been changed to Simplified Chinese and the name readings are modern, so if you want to use a name, confirm that you have the Nara-period reading and kanji.
The Book of Japan | 日本書紀
A history of Japan written in 720 CE, consisting largely of daily records of court events.
The Chronicles of Japan | 日本後紀
A history of Japan written in 840 CE, consisting largely of daily records of court events.
Continuation of the Chronicles of Japan | 續日本後紀
A history of Japan written in 869 CE, consisting largely of daily records of court events.
Reading and Writing Old Japanese
Old Japanese is the language of the Nara period, the 8th century.
The Phonology of Old Japanese (PDF)
(Early) Old Japanese Phonology
This site refers to Nara-period Japanese as Early Old Japanese, and Heian-period Japanese as Late Old Japanese.
Miyake, Marc Hideo. Old Japanese: A Phonetic Reconstruction, 1st Edition. RoutledgeCurzon, 2013.
This is the most recent attempt at reconstructing Old Japanese.