The JAL First Class lounge is truly another world from the world of AA (not that I don't love AA). I was there last weekend and was greeted by bowing employees who eagerly showed me around the facility and arranged an appointment for a massage at the Sakura Lounge (the F lounge had no more appointments until after my flight left). I only wish I had more time to try the shower suites which I've heard were excellent. Even the Sakura lounge is much nicer than AA's Flagship Lounges in terms of service, food and facilities.
Truly a lounge worthy of the title "First Class"