In the sense that it hangs up in the sky. Really, the moon doesn't do anything the sun does. There are some kinds of youkai that gather power from it, such as vampires, but in general it's not the same.
And it has it's own civilization on it, considering there are a small number of Lunarians in Gensokyo.
[video]
And it has it's own civilization on it, considering there are a small number of Lunarians in Gensokyo.