Though Japan doesn't officially have a "military" per se (自衛隊 means "self defense force") - they are swooping in to do things in typical military flair.
From about 7:30, they brought in water canons (trucks) and dropped nearly 30 tons of sea water from the air using Chinooks (thank you Boeing).
Reactor #3 is still steaming - so it ain't cooled down yet.
I also think the twitter stream relative to "原発" (nuclear reactor / nuclear power plant) is quite interesting. Many of the people on twitter are saying the same thing that I have been - get out.
If you want an interesting exercise in reading plain Japanese - no textbooks, no formalities, just people talking - search "原発" on Twitter right now.