Ehh, there is a little behind that which gets lost. The 1st in the world is most notably Okinawa. The rest of the country is down a few pegs (still top 5).
But the average Japanese diet is loaded with stuff which is stomach cancer promoting. A lot of preserved meats/fish, ridiculously high salt content, surprisingly high sugar content on many dishes. Its still much safer than what the average American eats.Plus their healthcare system makes up a lot of the difference there. Japanese people see doctors more often, especially the elderly.
A couple of things on that menu are worrisome:
Omuraisu (is just an omlette with fried rice and ketchup. Pure carb and cholesterol bomb)
pickled daikon (crazy high salt and artificial sweeteners)
miso soup (so much salt that miso paste never expires)
konbu & hijiki (Both come right from the ocean with sea salt encrusted on it)
agedashi (FRIED tofu)
Damn, I am hungry typing this out!! I love all that stuff and can make much of it at home.