I am practicing Japanese Jujitsu, I am currently purple white stripe belt. Physically I am about 75kgs, and about 5ft 7-8.

My problem is when I hip throw (Ogoshi) my regular uke, probably a few kgs heaver and a couple of inches, its great, I get in quick low and fast, and my Uke gets proper air on the throws. (again with other uke's same height / weight or less no problem).
But when I tried the same hip throw/ Ogoshi on a 102kg uke (all muscle – was in a weight lifting team) who is about 6ft 2 in height, its just rubbish I think I am going in low and fast, but the throw ends up more like a slide of my hip, and when I did manage to get it all done properly he didn’t get much air (and later admitted, he helped by jumping a little).

So any advice on how to hip throw a much larger/stronger opponent? Or could it be a hip throw is not for every opponent? - I know there are other throws I could use. Dropping body drop / stamp etc, but I want my hip throw(Ogoshi) to be spot on.