Looks like JAL will be adding a 2nd daily JFK flight, but this flight will be operated on the 787!

Japan Airlines’ schedule for its new daily flight between Tokyo Narita and New York JFK will see flight JL004 depart NRT at 7:45 p.m. daily from March 30 to October 26, 2014 and land at New York JFK at 8:00 p.m. the same day, local time, after crossing the International Dateline en route.
In the other direction, flight JL003 will leave JFK at 9:30 a.m. and arrive at NRT at 12:40 p.m. the following day, local time, after crossing the International Dateline.

Further info: http://www.airlinesanddestinations.c...k-jfk-service/