This Marui Mistubishi Jeep is quite interesting, somehow...
It appeared in Marui RC catalog from 1986, on the same page as the Marui Samurai (MT60-RC10), just behind the kit 7 (CJ-7 Golden Eagle) and 8 (Toyota Land Cruiser), which were both 7,2V re-edition of the 6V version from 1983...
But the story don't stop there. I already mentionned that there was parts for the Mitsubishi Jeep on the original Roll cage parts cluster as the roll bar front part width was not the same between the Toyota (short), CJ-7 (long), and medium (design for the Mitsubishi)... I had in my Marui document folders some pictures I gathered when I was searching information on the Hunter, and I found some interesting things on those... The Hunter on those pics were still a prototype, without its definitive bodyshell (presumably a Tamiya Rough Rider bodyshell with some modification at that stage), with some other indication it was still a prototype (there is a motor cover with a air vent, and the final rear monoshock is not in place, but some springs setup (which I found indications there was some provisions in the cluster with an number present and unused on the Hunter cluster). I had this picture only for the Hunter research... It's likely dated from late 1983 or early 1984. And when looking back at this picture I can see some indications the CJ-7 presented on the picture was not final yet : the bumper is different from the one which was released at the end. The Datsun Pick up which is presnt in the picture is also not the Big Bear : the wheelbase is still there, but the wheels are not the final ones : it is still with the Super Wheelie wheels... Big Bear Wheels came later.
Another picture I found later on is taken from a Japanase magazine, and is closer to the release of both Big Bear and Hunter as the Hunter is in its final mk1 form, while the Big Bear is now closer to the final version (bodyshell in its final form, monster truck tires but not the final ones, the final ones were even larger). And the Datsun Pick-up is still there, as well as the Mitsubishi Jeep...
Ultimately, this is also indicating this car was planned by Marui as soon as they started the Super Wheelie project. It was never released, maybe for licensing reason or because the bodyshell was too close in its form from the Wild WIlly from Tamiya (based on Willys Jeep, most likely)...