KIX-GMP is going all ECONOMY class. JAL will drop business class on this route. Reason (from official PR):
The aircraft configuration of Boeing 737-800 on the
thriving Kansai=Gimpo (Seoul) route however, will be changed from a 144-seater to one with a capacity for 176
in order to capture the healthy demand on that route.
They really spin this in a nice way