Combine soy sauce, lemon juice, mirin, 2 tablespoons water and bonito in small bowl. Let stand 30 minutes. Strain sauce through fine strainer; discard bonito shavings. (Can be made 4 hours ahead. Cover and let stand at room temperature.)
The secret to juicy grilled chicken, a sheet-cake swap for banana pudding, and more reasons to light up the grill and have people over all summer long.