Justin Bieber’s tattoo is a Japanese Kanji symbol that means “music,” which is clearly something important to Bieber. The character has multiple translations, and can also happen to mean bent, crooked or wrong.
Most Japanese kanji have multiple meanings (up to 20 or more).
Some meanings are obscure. If you choose a kanji tattoo for it’s obscure meaning — it can be an embarrassing mistake.
Here is the Kanji symbol Justin Bieber uses.
I’ve created it using Japanese font, Gyosho W4 .