Pizzaman are pizza filling stuffed Chinese style buns found in Japanese conbini (convenience stores). The dough was made based on this recipe from Youtube though I had to increase the amount of water I used to 120 ml rather than 100 ml. The filling was spicy Italian sausage filling removed from the casing and cooked off, cooled and then combined with jarred pasta sauce and grated mozzarella cheese.
I had to do a bit of fiddling with the amount of pasta sauce I added as it was too wet to start with and my pleating needs work but otherwise, this recipe was a winner.
Cooking is Fun ... Really!! 
What a great combination of different approaches to what looks like a Chinese snack.
Thank you. There’s also a curry version with curry powder in the dough for colour and pork/carrots/onion/tonkatsu in the filling that I’m temped to make in the future. Of course, the sweet version with anko paste is still a favourite.