...... In this light, how you see claims that in aikido you can pin somebody with one finger (or even one hand)….
Again, please no IP/IS nonsens discussion here.
I would'nt be surprised by this. The one finger I saw on youtube was tohei sensei pinning a person the finger pinning the persons temple. I havnt tried this but it is not you that is doing the work but gravity, you are only a helper, a part of the equation but not the complete solution.
Another good example is endo sensei. in his ikkyo pin, he doesnt grab anything. he just puts light pressure on the elbow. he even lets uke try to get up and times the contact in putting pressure again to offbalance uke to pin him again. this is concrete example that ukes opponent is not nage but mostly gravity.