http://www.ebay.com/itm/ARIA-PRO-II-RSB ... 4abcf9ce7dI have one of these. Cool vintage 80's Japan bass that doesn't come up for sale that often. Typically exceptional Matsumoku build quality, good sounding P/J configuration with concentric vol/tone and phase switches for each pickup, excellent fast jazz neck.
NOTE: This one has been converted to fretless, although the seller fails to mention it in the listing! Looks like a nicely done conversion, so if your're into fretless, that might actually be a plus for you... looks like it's probably the original lefty factory case, too.