I'm going to go look at the other topic, thanks.
OK, I'm back.
Pleasure Garden may have been erased by the tsunami. It sat directly on the beach, just a couple feet above sea level, and that coast nearly faces the earthquake's epicenter.
Kamine Kaihin sits well uphill above Hitachi, which has a rugged coastline facing away from the epicenter, It should be fine unless the quake itself knocked rides down.
Tokyo Disney Resort has announced that they will be closed until further notice. They will conduct inspections to make sure everything is safe and reopen when it is appropriate. (AKA after power has been retored throughout the Kanto plain.)
The inland parks of the Tohoku region like Nasu Highland and the Utsunomiya parks will likely close for inspections and reopen along a similar timeline as Disney.
The Sendai parks, won't have been affected by the tsunami, as they sit inland on high ground. The earthquake may have been quite destructive up there, though.
The real issue for all these parks is that there won't be anyone attending them until the country has recovered.
Universal Studios Japan has stated that they will operate as usual.
Nagashima Spaland sits on the coast, but is set far enough into Ise Wan, that the tsunami can't have had any effect. (Waves don't make right turns.)
Fuji-Q will likely be fine, that park, set as close to Mt. Fuji as it is, is designed to withstand tremblors. Remember the conversations about how extra-beefy the supports for Eejanaika are?
Anyways, 'nuff said.
IBTL, IMHO.