The depth and extent of stupidity in this thread is amazing. Even for it being one of Tennisace's mentally challenged and flamebait threads.
US presence in Japan is a requirement for Japanese national security as the US acts as its guarantor. But the US doesn't only act as the guarantor of Japanese national security, but it also acts as the agent that both created and indirectly enforces the Japanese constitution.
It's hilarious to me how all the Weabos here white knighting Japanese women are unaware that Japan is by far the single most virulently sexist (not to mention rabidly and furiously racist) developed society in the world. The entire Japanese constitution was written by the US occupation and shoved down the throat of Japan at effectively gun point. It's that constitution that elevated women from chattel/property into a point where they actually have some rights (at least on paper).
While US presence on the Islands might irk nationalists in reality it's that very presence that dragged Japan kicking and screaming out of its semi feudal culture.
Should soldiers committing crimes in Japan be handed over to Japanese authorities for persecution? Absolutely. With a major caveat. The Japanese court system is NOTORIOUSLY incompetent. In Japan conviction rates are extremely and insanely high, this not due to the excellent police work of Japanese law enforcement, but due to a lack of an independent judiciary or an interest in due process. Essentially in Japan if the Police takes you to court, you will be convicted...unless you have the commercial or familial ties to not give a shit.
But let's not try to paint the American presence there as a whole malevolent, and paint Japanese society as some poor victim of American imperialism or racism.
And this is coming from someone who is generally highly critical of US military interventionism.