This article:

Nagasaki Bomb Maker Offers Lessons for Fukushima Cleanup

Provides for the first time that I have seen a price tag for the  Fukushima cleanup:  $112 billion (11 trillion yen) . For reference this is about 1/60 of Japan's GDP.  Of course the true cost of the disaster will be much more than this estimate, especially if you include the 100,000 people who were displaced and had their housed condemned, the cost of lost electrical power, etc.  This is probably more expensive than all other tsunami cleanup/damage expenses...but I'd like to see a comparison.