Kanji Tattoos on peoples body are symbols and scripts based based on simple and complex ideographic characters. ( An ideogram or ideograph is a graphic symbol that represents an idea, rather than a group of letters arranged according to the phonemes of a spoken language ).
Kanji Tattoo characters can represent objects, ideas, specific meanings and much more in a single character structure form. By viewing the Kanji Tattoo characters or set of characters, people can understand the meanings of the Kanji right away. ( well those that understand the Japanese language to be precise )
Japanese Symbols show meanings of words in visually expressive ways. The Kanji Dictionary consists of thousands of Characters / Symbols which represent and mean so many different things.