lol, the small amount of kanji I know, Tokyo, Kyoto, Yama, watashi, and ji, i can recognize fairly well. Better than most hiragana symbols. This is me with something like, fu, in hiragana.
To me it seems like an abstract image of a middle finger, implying that the artist is laughing at the person who purchased their "art."
(Needless to say I'm the wrong person to ask about Japanese calligraphy.)
It says either, 'Not suitable for a tattoo', or 'A baka and his money are soon parted'
My Iai teacher is an extremely adept calligrapher and when I've asked him to decode various pieces of 'artistically rendered' calligraphy I have, he says, laconically, "No idea." (he's grumpy). It seems, for the artist, it's the 'energy' or intent with which they're brushed that is important rather than their legibility, but I understand that doesn't help you