I recommend Tako-Pa, means takoyaki party. you can put anything you want inside, the popular choices are meat, sausage, cheese, mochi and even chocolate.
Pomiko, you look so beautiful today! When I was in elementary school, 10 takoyaki were 100 yen each 😊. There was another takoyaki shop a short walk away, and some okonomiyaki shops were privately owned, so there were many stores.