Japan is a different experience overall, not just a 2D version of ours. It looks to be a total rerendering of the film to properly use the dome. I’m willing to bet that 3D is nearly impossible at adequate light levels on that screen, and probably wouldn’t add that much anyway, except maybe some motion sickness.
Maybe replacement lenses are getting hard to come by, and they are saving them for the rides that can’t function adequately without them. As far as I know Dolby doesn’t sell the glasses with plastic lenses anymore but I don’t know what other suppliers they might have.