Boil the chicken breast, let it cool, and shred it finely.
Blanch the inari pouches in boiling water to remove excess oil.
Mix salt, sugar, and vinegar into the rice to make sushi rice.
Add mayonnaise, salt, and pepper to the shredded chicken breast and mix well.
Combine the chicken filling with the sushi rice and mix thoroughly.
Stuff the seasoned chicken sushi rice into the inari pouches.
Place the finished inari sushi on a plate.