make sure you check your flight status on JAL website. There are flights diverted already, e.g. JL061 to CTS
Domestic:
http://www.jal.co.jp/cms/other/en/weather_info_dom.html
International:
http://www.jal.co.jp/cms/other/en/weather_info_int.html
{ Reported earthquake in the Miyagi area }
JAL Group flights area are experiencing irregular operations due to earthquake .
We recommend checking Flight Status and Information for details.
Information will be updated pending latest reports.
We apologize for any inconvenience and appreciate your understanding.