Well, unfortunately, there's quite a lot of damage but I think this map should help you get a sense of what sorts of damage have occurred and where. The map is only in Japanese but AI and other tools should make it fairly easy to use. For example, I clicked on one of the "NEW" items in Yatsushiro, took the screenshot you see, copied the Japanese and popped it in ChatGPT and got this:
---- Start ChatGPT translation ---
Matsuejomachi, Yatsushiro City
Part of a Structure at Yatsushiro Castle Ruins Park Collapses
As of 6:43 p.m. on July 28
This footage was taken at Yatsushiro Castle Ruins Park in Yatsushiro City at around 6:45 p.m. on July 28.
Part of a structure has collapsed.
--- end translation ---
Sadly, there's enough damage to explore on this map to keep you busy for a while. :(
-- Kirk