Proth5's new oven perhaps?
What do you think of this? Can you find something similar in Okinawa? It is designed to fit over a burner and heat comes up through the selected pieces and reflected down in the middle. I think 6 pieces including a support ring and grill tray, baking tray and two piece funnel device plus a lid. I saw 3 different sets here in S Korea but this one looked like one could bake rolls and horseshoe baguettes in it. You could bake more than bread in it too! You can do a chicken or shrimp and grill some vegies and heck, have a grand 'ol picnic with this little gem!