help of a fuku-honbucho who is himself responsible for several gangs. The regional gangs themselves are governed by their local boss, the shateigashira. Each member's connection is ranked by the hierarchy of sakazuki (sake sharing). Kumicho is at the top and controls various . The saikō-komon control their own turfs in different areas or cities. They have their own underlings, including other underbosses, advisors, accountants, and enforcers. Those who have received sake from oyabun are part of the immediate family and ranked in terms of elder or younger brothers. However, each kobun, in turn, can offer sakazuki as oyabun to his underling to form an affiliated organization, which might in turn form lower-ranked organizations. In the Yamaguchi-gumi, which controls some 2,500 businesses and 500 Yakuza groups, there are fifth-rank subsidiary organizations. Rituals Yubitsume, also referred to as otoshimae, or the cutting off 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 give 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. This practice has started to wane amongst the younger members, due to it being an easy identifier for police. 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 and 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 (including their genitalia). 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 handheld tools with needles of sharpened bamboo or steel. The procedure is expensive, painful, and can take years to complete. When Yakuza members play Oicho-Kabu cards with each other, they often remove their shirts or open them up and drape them around their waists. This enables them to display their full-body tattoos to each