The Government of Meiji Japan had outlawed tattoos in the 19th century, a prohibition that stood for 70 years before being repealed in 1948.[68] As of 6 June 2012, all new tattoos are forbidden for employees of the city of Osaka. Existing tattoos are required to be covered with proper clothing. The regulations were added to Osaka's ethical codes, and employees with tattoos were encouraged to have them removed. This was done because of the strong connection of tattoos with the yakuza, or Japanese organized crime, after an Osaka official in February 2012 threatened a schoolchild by showing his tattoo.

Your next consideration should be where you want your tattoo. Is it something you want to show off, easily conceal or reveal, or a more personal project that only you will see? Your body will be your canvas, so it’s important to choose a portion of your anatomy appropriate to your art. Back pieces are exceptionally well suited to larger concepts, which you may want to expand at some future date. If you just want to start small, the bicep or the forearm are ideal for more contained show pieces, discrete emblems that can be worked into “sleeves”—either half or full—at a later time.
In Britain, there is evidence of women with tattoos, concealed by their clothing, throughout the 20th century, and records of women tattooists such as Jessie Knight from the 1920s.[79] A study of "at-risk" (as defined by school absenteeism and truancy) adolescent girls showed a positive correlation between body modification and negative feelings towards the body and low self-esteem; however, the study also demonstrated that a strong motive for body modification is the search for "self and attempts to attain mastery and control over the body in an age of increasing alienation".[80] The prevalence of women in the tattoo industry in the 21st century, along with larger numbers of women bearing tattoos, appears to be changing negative perceptions.
Tattoo inks have been described as "remarkably nonreactive histologically".[66] However, cases of allergic reactions to tattoo inks, particularly certain colors, have been medically documented. This is sometimes due to the presence of nickel in an ink pigment, which triggers a common metal allergy. Occasionally, when a blood vessel is punctured during the tattooing procedure, a bruise/hematoma may appear.
The word tattoo, or tattow in the 18th century, is a loanword from the Samoan word tatau, meaning "to strike".[1][2] The Oxford English Dictionary gives the etymology of tattoo as "In 18th c. tattaow, tattow. From Polynesian (Samoan, Tahitian, Tongan, etc.) tatau. In Marquesan, tatu." Before the importation of the Polynesian word, the practice of tattooing had been described in the West as painting, scarring or staining.[3]