すみません、このお料理に、カツオ節のだしは入っていますか？ — Excuse me, does this dish contain bonito flake dashi? (Restaurant · Dietary · Restrictions, Formal — to staff, JLPT N3)

Gesture & etiquette

Point to the menu item or the dish.

Be patient, as some staff might not fully understand specific dietary needs, especially in smaller, local establishments. It's often safer to confirm if a dish is suitable for vegetarians/vegans rather than just asking about one ingredient.