Now, because I do not understand Japanese, I'm more sure what is the localization of this specific theme park (there were several Namco Wonder Eggs theme parks over Japan) : Osaka? Tokyo?
So It's maybe not the GH-28 model on the video? It may even be the GM-16 ?
I hope our Japanese friends here may help us to identify the place and the model ?
It's GH-28. There were GH-28 and GT-6 at Wonder Eggs, but there has not been GM-16.
And Wonder Eggs was only at Futakotamagawa.
We could play this GH-28 first at "The International Garden and Greenery Exposition,Osaka,Japan,1990" (Tsurumi-ku, Osaka, Japan : Apr 1,1990 - Sep 30,1990)
And it improved and moved to "Namco Wonder Eggs" (Futakotamagawa, Tokyo, Japan : Feb 29,1992 - Dec 31,2000)