I'm trying to book some HND-ISG flights on JTA in April (NU71/70, to be precise) as a Visit Japan add-on to previously booked JAL international flights. They're listed as operating in the OAG schedule for April:
http://flyteam.jp/airline_route/hnd_...hedule/2014/04
And I can book them for March on jal.co.jp, but not for any dates in April, and they're also not showing up in ITA Matrix etc. When will they show up? If they only load 3 months in advance, does this mean I need to wait until February?