Kiraibashi, also called Imibashi or Kinjibashi, is the banned usage of chopsticks in Japan. Generally it is considered to be discourteous.
Kiraibashi as to the way to hold chopsticks
To eat by gripping a pair of chopsticks in one hand.
To hold chopsticks between the palms and to pray.
To grip a pair of chopsticks in parallel in one hand to lift food by using them just like a spoon. To lick chopsticks.
To use a pair of chopsticks each of which is of different kind and/or material.
Kiraibashi as to usage
Tsukibashi or Sashibashi
To spear food by chopsticks.
To make chopsticks stand on rice by pinking. It is the way to offer rice to the dead at a Buddhist funeral rite.
To pass food with one pair of chopsticks to another. Avoided because it reminds us of picking up funeral ashes. Also called Hiroibashi or Hashiwatashi.
To make noise by hitting eating utensils with chopsticks, or to call a person with the noise.
To point a person or a thing with chopsticks.
To pick up an eating utensil by the hand having chopsticks.
To ask for a second bowl of cooked rice, while holding chopsticks in your hand.
To pull the dish closer with chopsticks.
To put chopsticks without eating food in spite of having touched the food once with the chopsticks. As important people used to do so in old times, it can be considered as the behavior of suspecting the food is poisoned.
To move chopsticks here and there over food, hesitating which food to eat. Also called 'Madoibashi'.
After holding out the chopsticks to one food, to move chopsticks to the other food suddenly. To move chopsticks to other food without eating one food after putting the chopsticks on it. Also called 'Wataribashi'.
To poke food here and there with chopsticks.
To drip liquid of soup or the like from the tips of chopsticks.
To fumble for food remaining at the bottom of a soup bowl with chopsticks.
To clean chopsticks in soup or the like.
To remove the rice or the like adhering to the chopsticks with one's mouth. It is considered as a good manner to take a sip of soup as the start of a meal to avoid Mogibashi.
To suck chopsticks.
To have chopsticks in one's mouth.
To bite chopsticks.
To put food into one's mouth directly from an eating utensil with chopsticks, or to scratch one's head or the like with chopsticks.
To thrust food into one's mouth with chopsticks.
To put chopsticks on an eating utensil across its edges during a break.
To tap chopsticks on utensils, etc. to line up the tips of chopsticks.
To take food from a platter not with the common chopsticks but with personal chopsticks. To friends or on the occasion where a host wants the guests to feel free to eat a lot, the host sometimes suggest them 'Jikabashi' purposely.
After having finished eating fish meat on the upper side, to pick the meat on the back side through the fish bones with chopsticks.
To move unfavorite food aside with chopsticks.
To keep eating the same food. Also called 'Bakkaritabe'.