Rinse yuzu or lime (lemon) well under hot water, then cut into 4 slices.
Mix the soy sauce, mirin and sake together in a bowl. Place the salmon slices in a bowl and pour the marinade over them. Spread the lemon wedges over the salmon. Cover and leave the salmon to marinate in the marinade in the refrigerator for at least 1 hour.
Take the salmon out of the marinade, dab and fry (grill) in a pan or on the grill for approx. 3 minutes, brushing the marinade over and over again.