Currently, only 18 of Japan's 54 reactors are in operation.
Shut down reactors are still expensive to maintain.
The Monju reactor in Fukui Prefecture has been mostly offline since 1995; offline cost is 55 million yen a day (=about $600,000/day U.S.). The Japan Press article says, "let's at least hope that money is making the local residents happy."
Japan Times, May 22, 2011. Article by Phillip Brasor.

Once built, a reactor is a continuing expense, operable or not. Disassembly and removal also is very expensive.