Not sure if this helps but...
In iwama ryu thats morotedori kokyuho. Looks a lot like a Sokumen iriminage in other styles, but it is quite different in how it is applied.
If uke is holding with one hand to partners one wrist your throw could be classified asa sokumen waza ie penterating the centre of the uke as if using a spear thrust.Your illustration is indeed morote dori. Joe.