A systematic literature overview article on injuries in judo was recently published in the relatively prestigious British Journal of Sports Medicine. The articles is available electronically for free. It used data from the 2008 and 2012 Olympics judo, and had a thorough look at the existing (Western) literature.
Here is the abstract:
http://www.ncbi.nlm.nih.gov/pubmed/24255909
Here is the full article:
http://bjsm.bmj.com/content/47/18/1139.long
Here is the abstract:
http://www.ncbi.nlm.nih.gov/pubmed/24255909
Here is the full article:
http://bjsm.bmj.com/content/47/18/1139.long