Finely chop the onion, add to dish.
Finely chop the green onion, add to dish
Seed, then finely chop the tomatoes and add to dish.
Finely chop the salmon and add to dish
Sprinkle salt, Kikkoman soy sauce, and sesame oil on to mixture. Stir well so all ingredients are thoroughly mixed. Chill in refrigerator. Serve with Hawaiian Kalua pork and rice. ONO-licious!!