Kanji tattoo mistakes happen, a lot more often than many of their wearers realize. There are a lot of people walking around with tattoos that have mistakes which are glaring to anyone who can read kanji. In some cases the tattoo artist has reversed the stencil, resulting in a character written backwards, in others they've left out one or more of the strokes, or added something that has no business being there. Often, kanji tattoos are made up of meaningless combinations of characters or single characters that, on their own, are enigmatic at best.