Yes, fully cooked Okonomiyaki freeze very well. Cook and cool the savory Japanese cabbage pancakes. Do not add toppings. Instead, transfer fulled cooked and cooled pancakes into a ziploc baggie and store in the freezer for 1-2 months. If freezing multiple okonomiyaki, add parchment paper in between so they don’t stick together.
To reheat, heat in an air fryer for 5 min at 400F – flipping halfway. Or reheat in a non-stick skillet until hot and sizzling on both sides. Then add the Okonomiyaki sauce, kewpie mayo, and other toppings of choice!