第四教 · Dai Yonkyo
Utsuri Goshi 移腰
Shifting Hip
Mechanic
Uke attacks and tori answers by hoisting them into the air with a rear bear-hug arch. Then, while uke is still floating, tori swaps their own hips underneath and folds uke over the newly arrived hip to finish the throw.
Analogy
A kid bounces way too high off a trampoline and drifts over the yard's rail fence. At the top of the float the rail arrives under their belly, they jackknife over it, and flip down into the neighbor's flowerbed.
Why it maps
The trampoline is tori's initial lift that floats uke, and the fence rail is the hip slid in mid-air: a new pivot appearing under a floating body that folds and rotates over it.