Is there a traditional Japanese blessing for before dinner?

Yes, there is a traditional Japanese phrase for expressing gratitude before a meal. It is called "Itadakimasu" (いただきます), which roughly translates to "I gratefully receive" or "I humbly receive". It signifies respect and appreciation for the food and the effort of those involved in providing it. Itadakimasu is typically spoken before a meal, typically with bowed head and clasped hands, as a moment of reflection and gratitude for the food.