Another great TR...

With respect to the JAL segment, given that J Class, as you note, does not have meals and is really only a larger seat, the upgrade from J to F for only 8000 en is very nice indeed. In fact, I think although the upgrade to J is only 3000 en, I would probably not bother with the same on such short flights. Some can correct me but I recall F is only available between CTS and HND and FUK and HND.

I have also been very surprised about efficiency of boarding and also security on the domestic side at Japanese airports. I thought that it was irresponsible to be leaving to the airport from my hotel right near Hakata Station to get to FUK at 55 minutes before departure, only to find out that we were too early to clear security. The efficiency also works since Japanese people LISTEN to the instructions and board according to those instructions. Sadly, this is not the case at airports I have been to outside of Japan.