Originally posted by stargold:
Personally, in NRT, I like to go to the SQ lounge to get some things to eat (smoked salmon sushi and cup noodles etc), then go to the UA lounge to get a shower (very nice showers! 
). It has pretty much become a routine for me to do this when I'm in NRT.
Access rules, as per Star employee's guide, say that you should have access to all Star business class lounges when you fly int'l business class.
I think StarGold is right. You have access to all *G lounges not just the one you are ticketed for (except for SQ lounges at various locations).