while we were looking after the passengers inside the terminal after the incident while ground staff did absolutely nothing, the pilots were kept out on the tarmac with the authorities for a VERY long time, it was a very stressfull time for them all.
It sounds funny, but leaving the country isn't necessarily as stupid as it sounds, as the Captain can be held in prison for up to 28 days without being charged while the investigation continues. If there's any injuries, the Captain can be held completely responsible for them in Japan. It's a very different system over there.