The Japanese term for that spot... it was bugging me all week last week. I could not remember for the life of me what the term is for that. I called JW, but he didn't answer. I called Nick Lowry,a nd he knew what it was I was taking about but he's developing old-timers like me as well, so he suggested I call Patrick Parker. Pat is a good guy, and a great teacher, and Nick considers him to be the encyclopedia of all things Japanese arts.
The term is shikaku, meaning "the dead angle." I don't know if dead angle means if the person is at that angle to you, you're dead, or what, but it seems appropo.