Not sure if many people travel between HND and GMP (Seoul Gimpo), but I'm on it almost monthly.

It used to be served by a 2 class 767, but earlier this month I was surprised to see it being operated by a 3-cabin 772.

I had purchased J but confirmed seat 2B in first class at time of booking. When I asked about the new bird and my seat assignment, the FA said it's possible that the plane was repurposed from one of the Japan<->US routes, possibly IAD. Also, she remarked that this route is only sold as a 2-class, but that NH's best customers get access to the first class seats.

Given that JL operates a 744 and OZ just recently upgraded its aircraft to an A330-300 with new J seats, it's good to see NH take a step in the right direction.