[I somehow missed learning the nagasaki fart, now I have no idea where to get it to continue.]

Go to Canada, go to the town on the very left of your map.

Then head south, take the bridge across and talk to "The Monks".

You will need to prove yourself by using your Dragonshout and Cup a Spell on the monk on the left side.

I went to the town and crossed the bridge, but there was no one there. Just an empty house. How do I get the nagasaki fart now?