Yubitsume, or the cutting of one’s finger, is a form of penance or apology. Upon a first offence, the transgressor must cut off the tip of his left little finger and hand the severed portion to his boss. Sometimes an underboss may do this in penance to the oyabun if he wants to spare a member of his own gang from further retaliation. Its origin stems from the traditional way of holding a Japanese sword. The bottom three fingers of each hand are used to grip the sword tightly, with the thumb and index fingers slightly loose. The removal of digits starting with the little finger moving up the hand to the index finger progressively weakens a person’s sword grip.The idea is that a person with a weak sword grip then has to rely more on the group for protection—reducing individual action. In recent years, prosthetic fingertips have been developed to disguise this distinctive appearance. Many yakuza have full-body tattoos. These tattoos, known as irezumi in Japan, are still often “hand-poked”, that is, the ink is inserted beneath the skin using non-electrical, hand-made and hand held tools with needles of sharpened bamboo or steel. The procedure is expensive and painful and can take years to complete.