Normally it’s kN - KiloNewtons in the metric for Thrust
At least in every engine spec I’ve seen published.
I think the author got his metric hosed up.
if you take 5000 kn and change it to ft lbs you get 40,000 ft lbs which is about the same as the f22 raptor.
Japan has already committed to purchasing 42 Lockheed Martin F-35 Lightning II fighters, also known as the Raptor,
I'm beginning to think that this is an English translation of an original Japanese article which may have led us down the discussion path we are having.