A few things...
A) You can't take an idiomatic expression--- actually, "face your fears" isn't really idomatic since the meaning can be infered by the words themselves, you can't take a coloquialism in one language and then translate that into another language--- You'd be better off finding Japanese idoms, or sayings and getting that tattooed on you.
B) By getting a Japanese tattoo you'll join the legions of people who though, on the surface, seem (to the ignorant) to be interested at a base level with Japanese culture, are in fact, actually so lazy about the subject, that they would willingly ask advice from random strangers on the internet as to what to permanantly put on their body in a language they can not read.
I don't mind tattoos too much, though everyone and their mother has a tattoo now, and MANY of them... It's probably to the point that NOT having a tattoo is cooler than having one; not having a tattoo is the new black.
You'd also be remiss in knowing that getting a tattoo places you not just outside the boundaries of general Japanese culture, but at the same time brandishes you within that culture as a thug.
Though it's true that many performing artists, Namie Amuro, et al, are wearing tattoos these days, generally speaking the act is still seen in society not just as a yanki or juvenile delinquent low-class thing, but overall as a Yakuza thug practice.
None of these things may deter you from getting a Japanese tattoo, but knowing these things, and still getting such a tattoo makes you complicit in an act of complete irony, rather than anything remotely meaningful.
I don't know you, this isn't a commentary on your character, my words are meant to discourage you from doing this--- I hope you take my advice.