I wanted to make a follow up email. I received a couple of emails from members of the list, thank you all. And thanks to Anne LaVin I contacted NOA and learned a couple of things. According to their email, origami Day in Japan was indeed established by the Nippon Origami Association NOA, and in 1980... 42 years ago! That's what I learned, I hope others here appreciate the information as well .
Cheers! -- Gerardo G. gerardo(a)neorigami.com instagram.com/neorigamicomKnowledge and Curiosity in Origami: six private classes online "(...) It doesn’t happen often, but when it does, it takes your breath away and fills you with the true joy of origami. I experienced this in my lessons with Gerardo G. I wouldn’t trade it for anything. Gerardo is (...)" C. R. Read the full review