Aloha, SK! According to Shiro, he once worked for Zippy's and had a hand in developing the Zipmin, which seems to be the premium saimin dish for that food chain. When he went out on his own in the '70s, he created and registered the Dodonpa, which you could say is several steps beyond the Zipmin. The proof may be in the testing. If you can get one of your erstwhile tasters to down a Zipmin and a Dodonpa side by side and live to tell about it, that will truly extend the boundaries of culinary exploration. The other avenue of inquiry is to get Charly Higa's side of the story. One day when I feel manly, I just may do that.