How much does USJ dropping a bit affect the rest of the parks?
I doubt that you can isolate that cost with the public info they give out. USJ has high attendance, but that's still considerably less than the total attendance for Hollywood, USF, IOA & VB. Plus Orlando has a ton of hotel revenue. ....and Singapore doesn't count since Universal doesn't own it...... Bottom line, even without USJ weather related issues, it would have basically been a fairly flat quarter for theme parks.
Back in 2016 when USJ was first acquired, Comcast did indicate that it produced around 28% of the revenue of Universal parks (when they gave their pro-forma measures).
Basically, here's how I'd measure it:
Let's assume that UOR/Hollywood have grown a bit faster due to Harry Potter in Hollywood and new hotel rooms in UOR boosting attendance there: USJ should be around 27% of revenue in 2Q but fell heavily in 3Q (total parks revenue was $1.55 billion in 2Q and $1.528 billion in 3Q)at the moment.
USJ's revenue probably declined at least 15% from $418.5 million to $355.73 million. (A 15% decline is a huge negative for a theme park quarter-over-quarter, but USJ was closed for 2 days from a Typhoon and there were refunded tickets and trips cancelled for a week or so around that event, and there was also a massive heat wave and earthquakes that also caused people to avoid the park; that would cause a drastic decline in quarter-over-quarter revenue). Think about a 15% decline being the equivalent of losing an entire 2 weeks (14 days) worth of revenue out of a 90 day quarter...
The reason I'd expect the loss at USJ to be that large is because Universal Parks EBITDA decreased by $50 million from 2Q to 3Q; that means that functionally USJ probably actually lost money in 3Q... since the park was still operating at costs as if it was expecting the same attendance in 2Q.
So that means UOR+USH (along with licensing fees etc) went from $1.132 billion to $1.172 billion (or an increase of $40 million or 3.2%) if the decrease in Japan was as heavy as I'd expect.
Worth noting that attendance wise, UOR+USH were probably relatively flat from Q2 to Q3 but that 3.2% boost is mostly coming from higher prices.
Overall, there's no real impact, Universal's parks are run with a much tighter cost structure than Disney's, so a dramatic one quarter decline isn't going to harm the overall finances at all. I'd expect a quick snapback in the 4th quarter.