Going out from Gensokyo...

But any one of those youkai sages will come and stop you.

With your power alone, it will be utterly impossible.

What are you implying here?

It must take a lot of time for you to break through the Hakurei Great Barrier on your own. Not to mention the amount of things that need to be prepared

For now, it's just a small scratch, so they haven't noticed it.