I’ve scoured the internet looking for it so you don’t have to! Maybe it’s not a particularly hot item, but it is the first modern-style product in the RPG Maker line. It has pretty much all of the basic RPG Maker stuff—2D scrolling maps, sprite sheets (with an included editor), game disk export, event, map, and entity editors. It’s for PC-8801 and there is no sound or music for some reason, as that wouldn’t come around until Dante 98 and other later offerings.
If for whatever reason you can’t secure the download (because too many people have downloaded—fat chance of that happening, you don’t want to see my site stats), email me at email@example.com and I can send it to you directly.