In a sauce pan mix soy, mirin, sugar and sake, place on a low heat and simmer for 30 min. Debone and take the skin off the salmon then cut them in 4cm squares. Heat up some oil with 2 cloves of garlic an 4 slices of ginger in a frying pan over medium heat. When sizling fry the salmon until golden on both sides. Deglaze with 25 ml of sake then add the teriyaki sauce you made earlier reduce for 1-2 minute. Top with sesame seeds and sliced spring onions. serves 6