It’s really interesting to see the differences among cultures. For me soup and fish would be more appropriate as a supper. I cannot imagine myself eating any of these things just after getting up in the morning, let alone the miso soup with its green onion.
I guess many Japanese people couldn’t imagine themselves having my favourite breakfast, toasts with olive oil and tomato. I've found a link with a picture of it:
Tostada con tomate - a cheap Spanish breakfast or snack