Cut Konnyaku into strips 1/4" wide and 2" long. Peel Carrot and cut into strips 2" long and 1/4" wide. Cut Daikon into strips 1/4" wide and 1" long.
PREPARE IN ADVANCE:
Bring 3/8pt of water to boil and drop in diced pork. Cook for 10 minutes
Cover pork bones with 2 1/2 pt cold water, bring to boil uncovered. Reduce heat and simmer for 30 minutes strain broth. Set aside pork and broth.
Bring 3/8 pt water to boil and drop in Konnyaku, return to boil, ans set aside.
Steam Shiitake for 4 minutes, discard stalks, slice caps into strips.
Peel gobo to make 3 T of peelings, discard root.
Drop the Konnyaku into the pan of pork broth and bring to boil over low heat. Add carrot and Daikon strips and raise heat. Bring to full boil , add Sweet potato and mushroom strips. Skim off foam. Cook for 5 more minutes and, with the back of a spoon, rub in the miso in through a strainer. Stir in MSG. Stir in the Gobo (if used).
Transfer soup to a large serving bowl, sprinkle onions over the top, and add spice.