What makes teriyaki sauce classic-style?
Classic Japanese teriyaki is built from soy sauce + mirin + sake + sugar, then simmered until glossy. Many home and American versions add extras like ginger, garlic, sesame oil, cornstarch, honey, or pineapple. Those can be delicious, but the traditional shine comes from reduction, not starch.
Can I use salmon with skin on?
Yes, and I recommend it. Sear it skin-side down first so it gets crisp and acts like a little protective layer while the fish cooks.
What can I use instead of sake?
If you cannot find sake, use dry sherry or dry white wine. In a pinch, you can use water, but you lose some of that rounded, restaurant flavor.
What can I use instead of mirin?
Best option: use a product labeled aji-mirin or mirin-style seasoning (it is sweeter). If you use that, taste the sauce before cooking and reduce the sugar a bit if it seems very sweet.
Quick substitute (not identical, but it works): replace the mirin with 3 tablespoons rice vinegar + 2 tablespoons water + 1 extra tablespoon sugar. This keeps the liquid volume closer to the original so the sauce does not reduce too fast. It will be a little sharper, so keep the heat moderate when you simmer.
How do I know when the salmon is done?
The salmon should flake easily and look opaque on the outside with a slightly translucent center. If you use a thermometer, aim for 125°F to 130°F for medium and juicy, or 135°F to 140°F if you like it more done. For maximum food-safety assurance, the FDA recommends 145°F.
Why did my teriyaki sauce get too thick?
It reduces fast. If it turns syrupy, whisk in 1 to 2 tablespoons water off heat until it loosens up. You are back in business.