It is well known in Japan that foreigners often get wrong or strange kanji tattoos on their body.
The strangest tattoos which I've ever seen are :
台所 (kitchen) 読書感想文 (a description of my impression after reading a book) and so on.
I laughed at a tattoo I saw last night for the first time in a while.
The man got his name tattooed in hiragana on his chest,
but the form of its hiragana is too terrible! It looks like as if a very small kid wrote it poorly.
みどり is green and his name, but it's usually a name for a girl in Japan.
Getting a wrong kanji tattoo is out of the question of course.
If people want to get a tattoo, I would strongly suggest to them that they should ask native people to check not only the spelling but also how beautiful the from is, before they do.
For your information.
In Japan, people who have tattoos are not allowed to go in a public hot spring and swimming pool because tattoos are still believed to be a symbol of Japanese Mafia.