What do Wagyu cows eat?

Can you please elaborate on the diet of Wagyu cows? Are they fed a specific type of grass or grain, or do they have a varied diet? Are there any particular supplements or feed additives that are commonly used to enhance their meat quality? Additionally, do Wagyu cows consume any natural forage, or are they primarily reliant on man-made feed? Lastly, are there any dietary practices that distinguish Wagyu cows from other breeds of cattle?