Interestingly, the only picture I can find is of a tiple!

Take a look on this page (scroll down) and see if it looks like yours. I seem to recall the name but I have no idea whether they were a part of another company or out on their own.

Considering the age/time period and the LOOK of that headstock--note the Martin appearance and Martin-like script--My guess is they got caught up in the Martin lawsuit issues with other Japanese companies, notably Takemine. Tak was strong enough to survive the period and others were not. Just a guess on my part, but I'd be willing to bet on my theory.

Spaw