What are some things that you can't do in Japan? -

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Don't wear shoes indoors when visiting Japanese homes (and some businesses).

Skipping the line when waiting for trains (or anything else) in Japan.

Avoid eating on the go when you're in Japan.

Don't get into a bathtub before showering first

Don't blow your nose in public.

Don't leave a tip.

Avoid loud phone conversations while on public transit in Japan

Don't wear shoes indoors when visiting Japanese homes (and some businesses).