I recently passed through Haneda's new international terminal and used the new JL First Lounge (shared reception desk with JL Sakura Lounge, on the floor directly above departures accessible via recessed escalator near Gate 11). Some have reported oneworld Emeralds are not allowed First admission (which seems to contradict oneworld lounge admission policies!) , but I was welcomed in warmly, with a guest, twice - once departing in the morning to Hong Kong, once departing late evening to SFO. The highlights: showers, automated self-operated massage chairs in a separate room, overstuffed lounger chairs with ottomans separated off with dividers for privacy one can get a decent snooze in, a bar with premium liquors and a food buffet with snacks and light foods. There are carrels for use of cell phones and also for computers and WiFi (unsure of details) is available. Missing: computers.