Eggs glorious eggs, poached boiled or fried...

This is a typical menu from a Noodle joint in Mizonokuchi. Nothing out of the ordinary about that you would think? The Noodles are reasonably priced in a variety of styles. But, can you spot a similarity between all the dishes? Having noticed the similarity before, I remarked to a colleague of mine "Why does all the food in Japan seem to come with an egg on top of it?" To which he replied, "Urrr umm, I don't know, I had never noticed before." At least it is not as bad as a restaurant that I visited in near Seattle at Snoqualmie Pass shortly before I came to Japan, where everything came with three eggs, have a butchers at the breakfast menu Salish Lodge