Yes, and the reach of organized crime into Japan's nuclear power industry is not only an ethical problem, but also a security risk. Criminal gangs could easily organize sabotage or strikes, or extort protection money for not doing so. Jake Adelstein called the nuclear business in Japan "a black hole of criminal malfeasance, incompetence, and corruption."
http://www.theatlanticwire.com/global/2011/12/yakuza-an
d-nuclear-mafia-nationalization-looms-tepco/46803/

The Nuclear Regulatory Agency announced last month that it was considering background checks for employees.
Japan seems to be alone in not already doing so although the International Atomic Energy Association began recommending such checks 14 years ago.

http://ajw.asahi.com/article/0311disaster/fukushima/AJ2
01301310069

That's shocking considering Japan's experience of domestic terrorism. However, checking individual employees will not eliminate the gangsters' role as an employment agency for the industry.

Greg Johnson