Wow…how do you know all this stuff? That was really interesting… thanks for explaining.
I knew that. I use to play anime. To add to that, the way numbers are ordered is like the way it is on a calculator. Like this.
7 8 9
4 5 6
1 2 3
Eh, I play a lot of games, and follow the ones I don’t play. If you spend enough time in the fighting game world you learn a lot about everything. 
But yeah, this particular piece of information isn’t super obscure or anything. I’ve even seen some KI players talk about moves in this way.