It's not kana, but probably a weird calligraphic stylization of a kanji character. I studied East Asian linguistics a little bit once (what a waste of time!), but I still can't recognize that symbol, or even its
radical. The problem with kanji is that it's very irrational and inaccurate, where one character can have a dozen different meanings depending on context. How can you be sure it doesn't also mean "obedience", for example? The history of the Chinese (and later Japanese) characters is filled with examples of state control imposing certain "politically correct" cognitive associations in the way the characters are formed, not unlike Orwellian NewSpeak. Associations with Chinese characters in my mind also connote mysticism, backwardness, lack of clarity, and style over substance.
It's sad for me that you want to avoid using
capitalist symbols (the dollar sign or its equivalent) due to potential negative connotation. In my mind symbols for anarchy and capitalism balance each-other out and correct each-other's flaws - one without the other is tyranny.
I see your point about the hand, but I still have some nitpicks about it, like the way it is stylized without fingerprints, which slightly reduces the connotation of individuality and human proximity, as if the person is wearing gloves.
I hope you'll take my psychoanalysis / nitpicking of your work in the constructive spirit in which it was intended - it's your flag, and there's no right or wrong way to do it. I'm just offering my complete braindump of every detail, just in case it might be helpful in some way. Once again, I really do like the flag overall.