The plane: A Dreamliner 787-9. Still the coolest thing in the skies.
Class: Economy
The seat: Economy Class seats have a 31 to 32-inch pitch and a 17.2-inch width. There's an AC power charger.
How full: I couldn't spot an unused seat. No wonder they've increased service to Tokyo by landing at Haneda (which is nearer to the city).
Fellow passengers: A little more than half of the crowd in Economy were Asian travellers, obviously the vast majority Japanese.