Pizza toast is a Japanese invention. Craig Mod made a beautiful movie about a Japanese cook crafting pizza toast with incredible dedication. Pizza toast is best consumed on a low table, cross-legged on on your knees. You carefully break one of the pre-cut quadrants loose and eat in with small bites.
To make pizza-toast, the thick Japanese toast bread is best. I have only seen slices as thick as 3-4 cm in Japan. At home, I use our Dutch bread, but it doesn’t come close. Japanese pizza-toast is superior.