»Why are tattooed people disrespected?«

The earliest evidence of tattooing in Japan is found in the form of clay figurines which have faces painted or engraved to represent tattoo marks. The oldest figurines of this kind have been recovered from tombs dated 5,000 BC or older, and many other such figurines have been found in tombs dating from the second and the third millennia BC. These figurines served as stand-ins for living individuals who symbolically accompained the dead on their journey into the unknown, and it is believed that the tattoo had religious or magical significance.

The first written record of Japanese tattooing is found in a Chinese dynastic history compiled in 297 AD. According to this text Japanese "men young and old, all tattoo their faces and decorate their bodies with designs." Japanese tattooing is also mentioned in other Chinese histories, but always in a negative context. The Chinese considered tattooing a sign of barbarism and used it only as a punishment.

By the seventh century the rulers of Japan had adopted much of the cultures and attitudes of the Chinese, and a result tattooing fell into official disfavor. The first record of tattooing as punishment is found in Japan in a Japanese history compiled in 720 AD. It reads "The Emperor summoned before him Marako, Humaji of Azumi, and commanded him saying: CE You plotted rebellion, and your offense is deserving of death. I will however exercise great bounty, and remitting the penalty of death, sentence you to be tattooed."

After the sixth century tattooing was widely used to identify criminals and outcasts. Outcasts were tattooed on the arms: a cross might be tattooed on the inner forearm, or a straight line on the outside of the forearm or on the upper arm. Criminals were marked with a variety of symbols which designated the places where the crimes were comitted. In one region, the pictograph for "dog" was tattooed on the criminal's forehead. Other marks included such patterns as bars, crosses, double lines, and circles on the face and arms. Tattooing was reserved for those who had comitted serious crimes, and individuals bearing tattoo marks were ostracized by their families and denied all participation in the life of the community.
For the Japanese, who valued family membership and social positions above all things, tattooing was particularly severe and terrible form of punishment.