Unfortunately the Utsunomiya is only about 100km from the nuclear reactors that are still spewing radiation. Although the official evacuation distance is 30km I really suspect that people aren't that keen to risk any more exposure than they have to just to keep to a timetable for getting new lenses out.
Of course they aren't.
The point is that, prior to announcing the lenses, Canon management should have taken into consideration that something might happen to prevent it from releasing the lenses on time, such as a new factory not being completed on time.
When the EF 200-400mm was announced, Canon already knew three lenses were not delivered on the announced schedule.
So Canon made an announcement that 2011 would be the year of the lens. As my grandmother used to say - man plans, and god laughs.