It's easy to learn readings of words already in your vocabulary.  I was looking to make a deck out of the most commonly used Japanese words adopted by English, "sushi, karate, etc..".  But this wikipedia article makes it easy enough to drag and drop them into your deck; there's some cool words here that I didn't even know about; ex. rickshaw = 人力車

http://en.wikipedia.org/wiki/List_of_En … ese_origin