Dude all your ki talk has made me buy another book today by Ushiro Kenji lol. BTW, I have had many many moments where I've shared moments of extreme depths with Japanese people, even when I was barely conversational. Those times were priceless.
It is funny you two mentioned that aspect of Ki and Ushiro Sensei. When I first met Ushiro Sensei back at the first Expo, we instantly bonded despite not speaking each other's language. Our families are still close to one another to this day and we talk to others frequently about how our ki created a connection that continues to grow today.
If you are interested in meeting Ushiro Sensei in Osaka, pm me and I will arrange for you to be able to attend one of the open seminars.