In my trip to Osaka I spent a day in Universal Studio Japan, and of course, Super Nintendo World.
It was such a nice experience, if you are into Nintendo games you should definitely visit!
Couple of gotchas:
- In the English website it says you need to purchase a ticket to entry SNW, but you can actually get it for free on the day of the visit (until sold out, so make sure to go early)
- You can enter USJ before the official opening time (and go directly to get the SNW area admission ticket)