Shuri-jou
The Mayor's office in Naha, the prefectural government, and the Japanese national government all assert that Shuri will be rebuilt if for no other reason than its cultural importance. This is reassuring, given Shuri's strong historical ties to the Ryukyu Kingdom (and, symbolically, to Okinawan nationalist movements). Perhaps putting aside politics will have a healing effect here, I don't know. I sure hope so. I have not yet heard of any American offers of assistance, but there is supposed to be an international account being set up to accept donations. I don't know if I can share further about that here, though.
Investigation is ongoing, but preliminary reports seem to indicate arson was unlikely. The structures burned were mostly made of cypress, some of it quite ancient at the time of its harvesting for the construction. The fire was detected by heat sensors sometime around 0230, with report being made by the security company to local authorities around 0240. More that that, I cannot say and shouldn't speculate.
When I was there, the castle buildings themselves were in somewhat of a state of disrepair from the war, but the place was still very beautiful. The temple where I did my lessons had been restored sometime before I entered school at Mercy Elementary (an overseas dependent's school near Ginowan). That would have been sometime around 1966 to 1968 (fifth and sixth grades).