In a large stock pot heat olive oil over medium-high heat. Add onions and celery and cook for 4-5 minutes until it just starts to soft. Add in the ginger, garlic and turmeric; cook for a couple more minutes.
Pour in the chicken broth and add in the chicken breasts and soy sauce. Bring to a simmer and cook for 13-15 minutes, until the chicken is cooked through. Remove the chicken and use 2 forks to shred.
Add the chicken back to the soup, along with the rice and black pepper. Cook for 2-3 minutes until everything is warmed through. Taste and add salt if necessary.