Japanese Food Etiquette

It all started almost 3 years ago, not knowing how does japanese food taste like, untill one of my friends convinced me, and i did !! and surprisingly, since that day, am IN LOVE with japanese food.
Now lets be honest, they do have some bad tasting kinds, but most of them are just mouth watering.
And since that day, i have been convincing my other friends to try it, and so far i made 3 or 4 of them fall in love with it too, am spreading the love of japanese food around !

Now i never knew that they have sort of etiquette when it comes to eating sushi ! i was very interested to see this picture, let me know what do you usually do, and if you have your own way of eating japanese food !