1. Combine tamari, ginger, garlic, oil and lemon juice in a resealable plastic bag.
2. Add salmon and turn to coat in marinade.
3. Place in the fridge for 4 hours.
4. Heat oven to 400°.
5. Transfer salmon to baking dish lined with parchment or aluminum foil. Reserve marinade. Cook fish for approximately 10 minutes, or until salmon is cooked through. While salmon is baking, add marinade to a small saucepan and bring to boil over high heat. Reduce heat to medium and continue to cook until sauce thickens.
6. Serve glaze over salmon.