"Then the alcohol started to flow. Japanese can drink a lot, enormous amounts of hard liquor."

Yes they can, but the Koreans leave them in the dust.

In Japan, at a similar dinner hosted by our Japanese hosts, watching my buddy confidently chomp into a fish sperm sac then immediately turn green was a memorable moment! Trouble was, due to the floor seating, he couldn't escape so had to sit and try to smile. Priceless.

That dinner was pretty disgusting overall but I got through it. I believe it was the same as yours, where they don't normally eat that crap. Having a bit of fun with the Americans.