I live in Japan and see most of those every day. Passing things between chopsticks (and, as I found out the hard way, by extension two sets of chopsticks used on the same dish), and stabbing them vertically into something are the two to care about.

Some of these definitely require more explanation. Like, how do you even eat with them if you can’t put the tips into your mouth? Just toss the food upwards and catch it?

Can we just get a shorter list of what it’s OK to do?