The Japanese "R" is very similar to the Arabic way of saying "R", so I'm able to pronounce it. I know quite a few people who have practiced repetitively until they've they lea how rned to pronounce... you can probably do so using youtube videos for help. It's just one of those things that take ages to master I guess! But once you're able to successfully "purrrr" like a kitten is when you know you've got it.