1. The Proper Way To Eat Sushi
The Japanese don't always use their hands to eat food, but you can count sushi as one of them. However, chopsticks are also acceptable.
According to famous chef Nobu Matsuhisa, one shouldn't dip the bottom rice part of nigiri sushi into soy sauce but instead should do so with the top fish part. This is because soy sauce has a high sodium content which may overpower the taste of the fish if applied too much.
In non kaiten-sushi (conveyor belt) restaurants, expert sushi chefs will usually apply the perfect amount of soy sauce for you, so diners can enjoy a sushi's flavours as intended by the chef.