According to Al's article, it's a combination of being the most expensive ride to operate and the ultra-low ride capacity.

cf. This

If you haven't been on it, get to Tokyo IMMEDIATELY. Of course, Alex would have naturally been on it recently, so he can back me up.

**SPOILER ALERT** If you really want to see what you're missing, the image below is a ride layout of 20K at Disneyseas. Note that it is VERY detailed, down to dialogue timings and detailed show scene descriptions. If you want to wait till you get to Tokyo, do not look.

Though I never say never, it's not looking like I'll make it to Tokyo any time soon (i.e, before i die).

So thanks for that. But it's really not much of a spoiler. There's no indication of what is SEEN on the attraction, just what is said in the ride narration at various points (which, when I get around to reading it, may provide big clues). But even that's not a spoiler, since I assume the actual ride narration is in Japanese!

Still, that's rad schematic.

I haven't been on it recently (we stood outside the gates, we didn't go in).

But I have been on it.

It is a ride that I don't ever need to ride again in a very pretty wrapper. More fun to stand outside looking at it than to go on it. But that was how I felt about a lot of stuff at TDS (and it doesn't take much to get me there since I already have so little baseline interest in rides anyway).

I prefer Journey To The Center of the Earth.