
I’m not a fan of teriyaki. Just not a good flavor imo.
What are you using? It's sort of a BBQ sauce and marinade made with soy sauce instead of tomato or worcestershire.
A good authentic naturally brewed soy sauce helps to start. There are two types, called shoyu and tamari in Japan. Shoyu is mellower and better. Kikkoman sells both in this country. Plus a lighter, less salt shoyu. That also sell premade teriyaki sauce and a popular dipping sauce for spring rolls.
I sometimes use Kikkoman teriyaki sauce to start. It already has wine, vinegar, and sugar added to their shoyu.
I think restaurant teriyaki sauce is usually made with mirin, a sweetened rice wine. Some cooks like to add rice wine vinegar instead of or in addition to the wine. Or they use regular sake. (sake is rice wine)
If you start with a good soy sauce, you can add a little wine, any vinegar, citrus juice, pineapple juice, etc. Sugar, brown sugar, maple syrup, honey, etc. for sweetness. If it seems too strong, dilute it with water.
We sometimes add garlic, ginger, allspice, anise, pepper, etc. .
Shoyu is brewed with soy beans and wheat.
Tamari or dark soy sauce is made with soy beans, no wheat. It is also sold as gluten free soy sauce.
Shitty soy sauce is made with extracts and caramel coloring.