Heat up 2-3 tablespoons of vegetable oil in a pan, and sear the chicken pieces until lightly browned all over. Remove to a plate.
Add the chicken to a big pot, along with the carrots, miso paste and mirin.
Add water or chicken stock to just cover all the ingridents
Put in pressure cooker for 25 min or Bring everything to a boil, then turn down the heat and simmer slowly for 45 minutes to 1 hour, until the chicken is tender.