Originally Posted by rustykettel

JAL domestic flights are generally not bookable until two months prior. There are exceptions for certain types of fares & tickets such as booking as part of an international itinerary. This will change Sept 10 when JAL switches to a 330 day calendar.

https://www.jal.co.jp/en/dom/reservation/ticket/

Very very unlikely, to the point of shocking, that JAL would be cancelling NRT-ITM. I would not worry about that.

ETA: partner award booking is blocked from domestic flights until two months out as well. For more on that or follow up questions on AS partner awards, see https://www.flyertalk.com/forum/alas...es-thread.html in the AS forum.