JAL suspended the two from working aboard aircraft and is considering punishing them, the company said, adding that the pilots did not think the incident was something worth reporting.
If the first action from the company is punishment, are they really surprised this event was not reported?
I'm sure the JAL OMA has the words "non punitive" in it, but if the culture is one of punishment, the pilots will try to bury most incidents if they think they can get away with it.
A lot of airlines operate like this.