Finally, I gave it a listen. I would have liked it more back then, but as far as 80s comfort metal goes, it's pretty good - and she's got a good voice. Decent guitar work as well... Nothing amazingly original here, but good use of the genre without being too cliched in a bad way. Mari has a really strong, belting voice - she might be described as a Japanese, heavier Pat Benatar.
It seems her first three albums - Lunatic Doll, Romantic Night (haven't found it at all yet), and the one I found originally, Misty Lady, are the ones to listen to. They're hard to find, especially on CD, but digital copies are floating around on the net.
Think you might be interested? This live version of Noah is pretty kickin': http://www.youtube.com/watch?v=XdBf5v1_CHE