You can try this site and if you like it you can get in touch with the teacher
Megumi Nanasawa (on the contrary of what the name might lead to think, he is a man).
I have been taking them since June and I am halfway through with the lessons. He sends lessons with planty of exercises and every other lesson he sends a review test...moreover it is pretty cheap.
Drawback...a native speaker in here corrected me a couple of times on something that came from those lessons...but surely and easily I know much more than I used to.