THE TATOOED RUNNER -- Taking a Break on a Cask of Sake

Irezumi (入れ墨, 入墨, 紋身, 刺花, 剳青, 黥 or 刺青) is a Japanese word that refers to the insertion of ink under the skin to leave a permanent, usually decorative mark; a form of tattooing.

The word can be written in several ways, each with slightly different connotations. The most common way of writing irezumi is with the Chinese characters 入れ墨 or 入墨, literally meaning to "insert ink". The characters 紋身 (also pronounced bunshin) suggest "decorating the body". 剳青 is more esoteric, being written with the characters for "stay" or "remain" and "blue" or "green", and probably refers to the appearance of the main shading ink under the skin. 黥 (meaning "tattooing") is rarely used, and the characters 刺青 combine the meanings "pierce", "stab", or "prick", and "blue" or "green", referring to the traditional Japanese method of tattooing by hand.

A tattoo is a form of body modification, made by inserting indelible ink into the dermis layer of the skin to change the pigment. The first written reference to the word, "tattoo" (or Samoan "Tatau") appears in the journal of Joseph Banks, the naturalist aboard Captain Cook's ship the HMS Endeavour in 1769: "I shall now mention the way they mark themselves indelibly, each of them is so marked by their humour or disposition".

Tattooing has been practiced for centuries in many cultures spread throughout the world. The Ainu, the indigenous people of Japan, traditionally had facial tattoos. Today one can find Berbers of Tamazgha (North Africa), Māori of New Zealand, Hausa people of Northern Nigeria, Arabic people in East-Turkey and Atayal of Taiwan with facial tattoos. Tattooing was widespread among Polynesian peoples and among certain tribal groups in the Taiwan, Philippines, Borneo, Mentawai Islands, Africa, North America, South America, Mesoamerica, Europe, Japan, Cambodia, New Zealand and Micronesia. Indeed, the island of Great Britain takes its name from tattooing, with Britons translating as 'people of the designs' and the Picts, who originally inhabited the northern part of Britain, literally meaning 'the painted people'. British people remain the most tattooed in Europe. Despite some taboos surrounding tattooing, the art continues to be popular in many parts of the world.

Body art is art made on, with, or consisting of, the human body. The most common forms of body art are tattoos and body piercings, but other types include scarification, branding, scalpelling, shaping (for example tight-lacing of corsets), full body tattoo and body painting.

More extreme body art can involve things such as mutilation or pushing the body to its physical limits. For example, one of Marina Abramović's works involved dancing until she collapsed from exhaustion, while one of Dennis Oppenheim's better-known works saw him lying in the sunlight with a book on his chest, until his skin, excluding that covered by the book, was badly sunburned. It can even consist of the arrangement and dissection of preserved bodies in an artistic fashion, as in the case of the plastinated bodies used in the travelling Body Worlds exhibit.

Body art is also a sub-category of performance art, in which artists use or abuse their own body to make their particular statements.

In more recent times, the body has become a subject of much broader discussion and treatment than can be reduced to body art in its common understanding. Important strategies that question the human body are: implants, body in symbiosis with the new technologies, virtual body etc. Scientific research in this area, for example that by Kevin Warwick, can be considered in this artistic vein. A special case of the body art strategies is the absence of body. Some artists that performed the "absence" of body through their artworks were: Keith Arnatt, Andy Warhol, Anthony Gormley and Davor Džalto.