Preheat the oven to 375 degrees . Bake the bacon on a broiler pan or rack-lined rimmed baking sheet until crisp, 18 to 20 minutes.
Meanwhile, in a bowl, mix the mayo, chives, tamari, ketchup, relish, sriracha, sea salt and black pepper (or seafood seasoning blend).
Using a food processor, pulse the salmon until finely-chopped; transfer to a bowl. Add 1/4 cup of the special sauce, the ginger, garlic, scallions, shiso and cracker crumbs; season with sea salt and black pepper (or seafood seasoning blend). Form into four 1-inch-thick patties.
In a large skillet or griddle pan, heat the oil. Add the patties and cook, turning once, for 10 minutes for medium-rare.
Place the burgers on the roll bottoms and top with the bacon, lettuce, tomato and onion. Spread the roll tops with the remaining special sauce and place on the burgers.