>>35356542A phonetic chart like this is what I was thinking of. OOne example of a consanant sound I can't make no matter how hard I try even after learning German all my life, is the uvular trill, while i can do all the other trills, I just can't do it, even though I know the method. Perhaps my uvular palette isn't wiggly wobbly enough. But I think a chart like this translated properly to japanese would help japanese learners with pronounciation.