Although I already had several hundred hours in the 747 at TWA, when I hired on at Nippon Cargo I had to go through their training program.
There's the American Way, and the Japanese Way, and they're very different.

After ground school and simulator we started line training. That entailed going on actual working flights with a Japanese instructor/check pilot.
Captain Ito was an older pilot, several years my senior.
He was a strict taskmaster in the cockpit, but when we hit the ground for a layover he was a party guy.

One night we were in Anchorage at a little bar and grill next to the hotel. It was December 7 and the usual stuff about Pearl harbor was on TV news in the bar.
Ito was drinking Long Island Tea.
Yeah, I know.
He was buying rounds and insisted that the crew join him.
So I sipped on my 'tea', slowly. Musn't offend.
Ito drank his down and ordered another.
And then another.
He was getting extremely 'loose'.

Now the Japanese usually don't like close physical contact.
But Ito looked at me for several seconds, then got up and walked around the table. Put his arm around me.
And VERY seriously said "Trof-san? Pearl Harbor? BIG mistake!"
I could only agree.
"Yes, Ito-san. Big mistake."
well, I guess we didn't have to talk about that any more.