Originally Posted by
dvs7310
The good thing about domestic travel in Japan is that there is no need to be there early enough to worry about a lounge. Security lines are only ever long during Japanese holiday periods, otherwise you'll get through in 5 mins most of the time, there's even a special line for people with imminent departures but I wouldn't recommend pushing it that far because the HND domestic terminals are quite big and take a good bit of time if your flight is all the way at one end.
JL's Class J does credit as business class on partner frequent flyer programs, but otherwise it's just a better seat. Service is the same as economy, and no perks like lounge, priority check-in, etc. If you're going to Nagoya city, why not just take the train? I actually do fly to Osaka frequently myself, but it's a ridiculous venture honestly just to get a few extra miles, the train is more convenient by nearly any metric and by the time you factor in transportation to/from each airport the timing is nearly the same. If you were connecting from somewhere else, it would make sense, but going city to city for Nagoya, Kyoto, or Osaka, the train wins out.
I want to see Flight of Dreams which is basically attached to the airport so this is one situation where transportation is actually better if I fly. But for normal situations, I agree with you. The other time I visited Nagoya, I took the train from Shin-Osaka.
As an aside, are you crediting those flights to JL? I feel like there's a sweet spot where if someone from Japan can fly to Europe once a year and is willing to do a layover in London, they can just do around 2-3 additional domestic JAL class J flights a month to get OneWorld Emerald through British Airways. A similar flying pattern may not even make OW Sapphire with JL.