• ¼ cup Japanese soy sauce
  • 2 tbs Worcestershire sauce
  • 1½ tbs Japanese rice vinegar
  • 1 tbs sake
  • 1 tbs mirin
  • 1 tbs tomato sauce
  • 1 tbs oyster sauce
  • 2 tsp soft brown sugar
  • Chili to taste
  • Ginger to taste

Combine all ingredients in a bowl. Can add shiitake soaking water to increase volume.