Nawa no Kankaku (Connection of Rope; 縄の感覚) is a term at Shibari Dojo that is used to label that subtle sense of depth in kinbaku. I first happened across the term while training in the Bujinkan. There was a blog article by Duncan Stewart where he tried to describe the lessons of Masaaki Hatsumi on kankaku as thus:
“We shouldn’t move just like we are tying someone up with a rope. It’s far deeper in significance as always. The concept is that we are tying our opponent up with our soul or Tamashii (魂). Being captured by ones soul or spirit can be likened to being wrapped up my an invisible cord or rope. The feeling of restrictiveness and entrapment is the ultimate aim of obtaining Nawa no Kankaku.” – Duncan Stewart
This is a very difficult thing to grasp as it is very subtle and seems to play on the mood of the moment, it appears as though you cannot force it. Well in actuality it’s not something you conjure through your dominance of the situation (that’s something else). Instead you draw the feeling out into the space (kukan; 空間), like luring or seducing it; you don’t want to scare the feeling away. As Hatsumi once put it:
“Don’t think of trying to make it work. You don’t have to make this work. Don’t be tied up in whether it works or does not. No one ever teaches you that it’s ok if it doesn’t work. It’s ok if it doesn’t work, because you can change. You can keep going.”- Masaaki Hatsumi
Performing a tie, knot, or achieving a desired position of the model is a very low aspect of kinbaku, these things should be automatic at a certain level, the next level is to be able to lure out the kankaku, to create that connectedness, to manifest intimacy.