In a saucepan, combine soy sauce, mirin, sake, brown sugar, honey, minced garlic, and grated ginger.
Place the saucepan over medium heat and stir the mixture until the sugar has dissolved completely.
Bring the sauce to a simmer and let it cook for about 5 minutes, allowing the flavors to meld together.
If you prefer a thicker sauce, in a small bowl, mix cornstarch with a teaspoon of water to create a slurry. Add the slurry to the sauce and cook for an additional minute until it thickens.
Remove the saucepan from heat and let the teriyaki sauce cool down.
Transfer the teriyaki sauce to a jar or airtight container for storage.
