Here is an in-progress picture. This is taré, basically Japanese barbecue sauce. You get a bunch of chicken backs and bones, put them in a wide sauce pan, put that in the oven at 400 F, roast for an hour until the bones are brown and fond has collected in the pan. Then pour some sake into the pan, deglaze the fond. Move everything into a deeper pot, add more sake, mirin, and soy sauce. Simmer the bones submerged in the liquid for a couple more hours. Then remove the bones and cook the liquid down to desired consistency. I've got two cups of taré in my fridge now.
