Kanji are the Japanese symbols used for tattoos. There are a few complicating matters with regard to accuracte translations:
1. Japan and China both use kanji, but there are some differnces in usage, much the way a person from Spain and a person from Mexico use some Spanish words differently.
2. There are formal and casual uses of kanji.
3. Each symbol has a meaning, but when you combine different pieces the whole may have a different meaning than each piece individually.
4. The way the piece is drawn can affect the meaning.
I have 4 pieces of kanji. Earth, fire, water and spirit. I checked several sources to be sure that I was at least close to what I wanted. I am willing to accept some innaccuracy, as I consider tattoo an art for and therefore subject to some interpretation.
As for why i have kanji pieces, I like traditional Japanese tattoos more so than "Sailor Jerry" or the newer bio-mechanical style pieces. I figure it's my money and my skin so I'll get what I like.
Why do non-Germans put Iron crosses on themselves, their cars, their shirts? Do Germans put American flags on their stuff?