Komlock's one-sided ashi guruma. This is weird in that it does challenge conventional thinking about what efficient footwork is. To set up the throw, he steps with his right foot all the way to the left side. Then from there, he pulls the opponent back in the other direction clockwise and blocks their leg with his left foot.
That's a lot of turning! But it does plant his right foot in an optimal position to rotate the opponent. To me, the more obvious thing to do is to leave the right foot where it is at the start of engagement, then just start rotating. But then your foot is at a place that doesn't give you leverage to rotate the opponent clockwise. (It would be an optimal spot for rotating counterclockwise, though. This is all assuming you're right-handed.)