Drain the tofu and cut into 6 slabs crosswise. Blot well between pieces of paper towel or clean tea towel. If you have time and can press the tofu ahead of time in a tofu press, so much the better.
Combine all the ingredients for the teriyaki sauce in a small container and whisk together.
Heat ¼ cup of the teriyaki sauce in a wide skillet (make sure to whisk well before measuring). Arrange the tofu slices in a single layer. Cook over medium-high heat until the bottom is nicely browned, 5 to 7 minutes.
Drizzle in ¼ cup more sauce; flip the tofu slices and brown the second side, which will likely take less time than the first, with the skillet now that much hotter.
Serve at once. Pass the remaining sauce around to embellish individual servings.