There is a book by this title, by Robert O. Kinsey - you should be able to find a used copy on line somewhere - and it has a wealth of information and incredible images of ojime. You will be able to spend many satisfying hours researching your ojime. Currently there's a used one on AMazon for $19 plus shipping.

There is a whole panoply of gods and demons in the Japanese mythology, and you'll have to go through all the images & explanations to try & match yours.

Happy bead collecting!