It's rather symbolic and ironic that the commemorative event for the March 11, 2011 disaster is going to be held at the National Theater where "kabuki" performance is regularly held.
(Almost worthy of Onion News coverage...)
To be fair, as a nation that is not very overtly religious, they can't pick a cathedral, temple or shrine for a ceremonial event to be conducted by the national government. There must be a (perceived) security concern also, judging by the way the police has been reacting to peaceful demonstrators.
I found a statement by the Prime Minister's Office announcing the event, laden with customary, formal cliche as to how regrettable and sorrowful was the loss of lives in this unprecedented disaster. (For those of you who read Japanese, you would understand what I mean from the Japanese text below. So cliche that it means almost nothing.)
From the Prime Minister's Official Website (2/24/2012):
On the one year anniversary of the March 11, 2011 disaster, the government will conduct the memorial ceremony at the National Theater.
It has been almost a year since the start of the March 11, 2011 disaster.
Wide areas were affected by this unprecedented disaster in which extremely large number of people lost their precious lives and people's way of living was significantly affected. When I think about the deep sorrow of people whose family members were lost in the disaster, it is a matter of greatest regret and sorrowfulness.
To express our sorrow to those who perished in the disaster, we will stand in silent prayer for one minute starting 2:46PM on the day of the memorial service [March 11] at the National Theater. I would like to ask the Japanese citizens to pray in silence at the same time, wherever you happen to be.
February 24, 2012
Executive chairman of the one year anniversary memorial service for the March 11, 2011 disaster
Prime Minister Yoshihiko Noda