to follow-up here....indeed there was no problem using the lounge as JAPak indicated above (CX DM/OWE flying on CX). I handed over my boarding pass and lounge invitation and was waved in by the JAL staff. Beautiful lounge, great massage chairs, IMO better food selection than the Pier F (although it is, like the Pier, a buffet). Great feel. Plus spectacular quasi-private seating in front of wall-to-ceiling windows overlooking the tarmac. Didn't seem like there were many flights the lounge was only about 50% occupied. That terminal in HND is wonderful