Narita Airport (NRT) in Tokyo encountered two separate Boeing 747 incidents involving Atlas Air (5Y) and Silk Way West Airlines (7L).
Boeing 747 accident
According to reports, Atlas Air (5Y) Boeing 747 operating flight to Miami (MIA) was diverted to Fort Lauderdale (FLL), and while taxiing wing tip collided with one of the Hangar structures.
The Korean Air Boeing 747 Cargo plane suddenly got unsecured and it roll down at Ted Stevens International Airport bay. Read More here