Could you translate please? I cannot even find that option within the Japanese text.

Is it correct that I cannot book domestic flights until 55 days before departure? I have a 21 day trip to Japan in May / early June. I have my LHR - NRT flight booked along with all the ground arrangements. The only thing outstanding are the 6 internal flights we need. I would like to travel JAL to get TP and miles but find this so frustrating in the land that has the best rail network in the world as competition. Is the cuurent Visitor offer (Yen 10,000 per sector) being extended to May / June flights?

Any advice would be most appreciated as finding help on the JAL and other websites is frustrating to say the least?