Rinse and soak the farro. Bring 2 quarts of water to a boil with a pinch of kosher salt. Add the farro and bring back to a boil, lower the heat and simmer for 30 minutes. Strain and rinse with cool water, set aside to cool completely.
For the couscous, heat one tablespoon of oil or ghee in a saucepan and add the couscous and stir for one minute. Add one and a half cups of boiling water and bring to a boil, lower the heat and place a lid on the pan. Cook for 12 minutes. Remove from heat, stir and let cool completely, stirring occasionally to keep it from sticking.
Peel and shred the carrots and cucumber. Mince the onion in a food processor or shred using a box grater. Finely dice the dark and light green parts of the green onion.
In a large mixing bowl combine the cooked and cooled farro, couscous with the carrot, cucumber, sweet onion and most of the green onion, saving some green onion for garnish.
Add In the furikake and stir.
Whisk together the dressing ingredients and add that to the salad and mix.
Shred the crab and mix with the Kewpie mayo then add to the salad and mix.
Keep chilled until ready to serve. When ready to serve, cut two avocados in half, remove the pits and skin. Finely dice then add to the salad. Serve.