JAL Sakura Lounge (Tokyo)

Voyaging Doc

Level 2 Member
Quick question:

I will be flying JL9 ORD-NRT in July in F on an AA award redemption. I am connecting from NRT to HKG and then to KUL on CX J the morning AFTER my arrival at NRT. I am reading great reviews on the JAL sakura lounge and was curious to see if I am permitted to go to the sakura lounge upon arrival at NRT despite 1) not having an immediate onward boarding pass 2) having onward J not F connections. Really I just want to quickly experience the lounge before going to the hilton narita and checking out Narita city.

Anyone know? Thanks!