Here is the latest, directly from one of the airlines
March 14, 2011
EMBARGO ON SHIPMENTS TO/FROM TOKYO NARITA
Dear Valued Customer,
Since the severe earthquake in Japan last week, the disruption in both domestic and international logistics to, from and through Japan has been severe.
While shipments into Tokyo Haneda (HND) are now operating on a normal schedule and flights are resuming today at other airports, we must advise that a necessary embargo, effective immediately, will apply on shipments into Tokyo Narita (NRT) until Thursday,17 Mar (Japan Standard Time).
All inbound shipments into or transiting Tokyo Narita will be embargoed, except for mail, official urgent aid or humanitarian medical items
All shipments being trucked to NRT from inside Japan will be embargoed, including shipments transiting Japan's other gateway airports
We will keep you updated as new information becomes available. Please keep in mind that the embargo may be extended beyond this date due to fuel shortages, rolling power outages or other local issues.
We appreciate your continued cooperation and support as our teams in Japan seek to normalize operations.