It matters who lands with their back on the mats and who has control/initiates the action.
In this case blue starts the throw, but white has a good grip and takes over the action to put blue on his back. It's easy to miss because it's a comparatively small movement, but during the throw white twists blues upper body and then guides him to the mat, This "already" counts as a second, counter-throw.
A bit of extra confusion stems from the fact that blue lands in a bridge position, not flat on his back. But this is scored the same, just for the simple reason that otherwise all top guys would dive head first into the mats and risk injury rather than a loss.
There are other throws that put the attacker on their back (e.g. sumi gaeshi), but in those cases they are still in control of the throw, which is why not everyone instantly loses if the back touches the mat.
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u/Senior-Chapter-jun91 Jun 14 '25
can someone explain to my non judo eyes?