As with Ron, comparisons would benefit you more than any criticisms I would make.

FWIW, I have a terrific video set from CoolRain, Aikido in Training, and UKE lands on his knees with this technique.

Isoyama's version is what judo calls KATA GURUMA, i.e., UKE's belly is on NAGE's shoulders, not his back, but naming conventions are quite variable.