Due to the inconvenience such as lack of electricity indirectly caused by Tohoku earthquake, some inhabitants in Great Tokyo area have moved to Osaka in order to have a better life.
Not only inhabitants in Tokyo but also foreign companies or embassies are moving their base to Osaka.
Actually, embassy of Germany moved its function to Osaka.
Especially, foreign companies reserve many rooms to ensure the place to make their exectives evacuate. So, some rooms are booked without being used.
HOTEL GRANVIA OSAKA says that they found the trend that more companies whose headquarters are not in Osaka book their rooms.
Another hotel staff said that it seeems that foreign companies are told to reserve hotels by their mother countries. It is probably because they strongly fear for emission of radiation from Fukushima nuclear power stations.
Partly translated from http://osaka.yomiuri.co.jp/e-news/20110318-OYO1T00619.htm?from=top