I'm trying to use the oneline booking tool to select JAL A class HKG to NRT.
According to Expert Flyer and JAL timetable flight JL 732 flies daily between Hong Kong and Narita, but the oneline booking tool does not bring up this flight as an option to book for any date from November to March. Is there any other way to book this flight? thanks.

It means that JL has not made any A seats available on that route. Short of hoping that they release A inventory at some future date (in which case keep the segment open but in A class) there's nothing you can do at this stage.

I'm still confused though. The only JAL flight showing is flight 736 which I can book in D class. Flight 732 is not showing at all, even though there is availability in D class on expert flyer. Flight 732 ( the only HKG-NRT A class flight in JL or CX ) is not coming up on the booking tool at all.

Ah, I understand your problem now. I have no explanation though. And to confuse matters even more, if you choose a DONE itinerary the trip planner does show the JL732 flights!

From my extensive research into just one flight NRT-HKG, JL released A class seats about 2 weeks prior to the flight date.

I am in the process of planning an A class Circle Pacific. One of the options I have is to fly JFK-NRT, but of course then there is the issue with no A class being available on JAL and having to book into D and taking my chances with A class coming available (there is A class available on AA).

I can understand their logic in holding back from releasing discounted fare seats when there is the possibility of selling full fare F on this flight. However on another upcoming award trip to Japan in the next few weeks it has surprised me how much JAL F award availability on the HKG-NRT sectors.

I can't help thinking that if JAL made A class available for revenue tickets then they would have fuller F cabins and would not feel compelled to make so much award space available closer to the travel date. This is counter-productive for JAL because passengers who could provide A class revenue to the airline will often book onto other carriers (instead of going with confirmed D), depriving JAL of this revenue. JAL will then release some of these seats for award travel because there is so much space available.

As much as I would like to fly JAL F on the transpacific sector, I have decided to reroute slightly to fly CX F on a JFK-HKG sector - which I am sure will also be wonderful, thereby depriving JAL of my potential JAL A class revenue.

But I am also going to try JAL's F class product, but on award travel over the next few weeks since they have so much award availability in F over the next few weeks.

IMHO, this is poor yield management by JAL.

JL might also be saving the 100 kgs by having an empty seat and selling the under floor 100 kgs freight capacity for far more than they get from the passenger (much like QF does). Just speculation though.