And many normal cultural things in the US would be regarded as an egregious offense in Japan (which has a very rigid, conservative, homogenous culture).
I can give one example. In US it is absolutely normal to arrive to the conference room, sit at the table and wait for a boss to come. In Japan to sit at the table before the boss arrives and sits would be an offense - I was actually advised to stand up and wait for the boss standing as all others did.
"During a 2001 game with the North Queensland Cowboys, Hopoate inserted fingers in three players' backsides and anuses. The first incident occurred during the seventh minute of play. The matter was referred to the rugby league judiciary on 28 March. Hopoate was suspended for 12 weeks for what one commissioner described as "disgusting, violent, offensive behaviour""