"Pork Koji-Buta" refers to naturally raised Japanese-style pork without the use of growth hormones. Pork spareribs cut to 4 inches, or pork spare ribs for barbecue, have a reddish-pink color with a hint of pinkish hue. There isn't an excessive amount of intramuscular fat in this cut. This makes them great for grilling or barbecuing since they have a good balance of meat and fat, resulting in a delicious and juicy texture when cooked properly.