Here is a how to make Chashu Pork Belly recipe, also from Serious Eats.
" Japanese chashu gets its name from the bright red Chinese barbecued pork known as char siu —you know, the stuff you see hanging in windows or stuffed into steamed bao ?—and it probably came to Japan from China around the same time that ramen itself did. But like ramen, it’s undergone some major alterations over the centuries. Unlike char siu, which is made by painting slices of pork shoulder with a thick, sweet marinade and roasting it, Japanese chashu is a simmered dish made with pork belly."
