oh this is so chilling, there's definitely something in there...amazing find
(also im in the uk so at least there's one other person in the same timeslot :p)
hi all, i've been looking at old blogs of people visiting the Joypolis locations in the pre-2001, post-1998 range, between when Uzumaki was published and when the reddit post came out, and I stumbled upon this one:
https://netanker.hatenablog.jp/entry/19990725/p1
most of these blogs are ordinary and usually detail visiting one location or another, this one the Yokohama Joypolis which had been recently refurbished, and renamed Joypolis H. Factory:

attached to the blog there was this image, and something about it seemed off, so I downloaded it.

looking at what could be pinball machines in the back, I noticed something weird about the one on the right, and zoomed in:

unsure if this spiral is related to uzumaki or if it was some other sega/stern brand machine (dreamcast promotion maybe??) but wanted to post here just in case.
the timing of the refurbishment also made me suspicious, what does everyone else think?