The Sakura Lounge (Level 2) at Narita International Airport was huge and the service & amenities were awesome. Plenty of beverages & snacks. Best place to chill until my flight (Gate 93 - JL 711) was ready for boarding.
My seat (20K) was already prepped with an amenity kit, a blanket, a pillow and noise canceling headphones. I definitely enjoyed the nice headphones, since I didn't have one myself. The amenity kit was great for a short red-eye flight. I also got slippers & a shoehorn. The entertainment selection was up-to-date and had Western & Asian options.
The seats had a comfortable, adjustable headrest & a padded seatbelt. I had a ton of leg room, a leg rest, an adjustable footrest, and a center divider for some privacy! I've never sat in an airline seat with so many footrest options. The seat was also wide & instead of reclining backward it reclined forward so that it doesn't disturb the person sitting behind me. Cabin crew was attentive & friendly.
JAL Premium Economy seats were a huge upgrade from the economy seats. I have sat in JAL economy seats and the Premium Economy seats were a million times better.
I would definitely fly JAL Premium Economy again.