The Makunouchi Box contained 8 chef sampler appetizers which was served in a traditional bento box. In our box that day -- the selection changes seasonally -- we had black cod, beef tataki, tuna jelly, sausage, mackerel, anchovies, tofu topped with some kind of bean, and ikura. It was absolutely a beautiful assortment of appetizers that you wouldn't normally get to eat.
I would definitely recommend getting the Makunouchi Box since it was something so different from your ordinary Japanese eats. I had a great time trying each of the eight appetizers in the bento box!