Here are a couple of Japanese cultural videos for you. They're probably dog-eared from making the rounds, so sorry if you've seen these already. Many people will find them useful.

First, the proper way to fold a shirt.

Second, the proper way to eat sushi.

That second one really brings back the memories, having worked in the office of a Japanese restaurant and having met my wife that way. But especially, after having heard and read more than my share of pretentious know-it-all Westerners who spent a few months in Japan and think they're the encyclopedia of "just the right way" to eat sushi. One more of those types and I'm gonna stick their head in a rice cooker. Oh, and here's a clue. When reviewing sushi, don't ever use the word "yummy." I don't care how good it is, raw fish should never, ever be described as "yummy."

They need to watch that video, because it plays like they sound.