No offence to you OP, but that second paragraph of yours makes it sound like spam. Might want to consider rephrasing.
To play devis advocate, to counterpoint the authenticity slightly, Salmon is actually not a traditional ingredient in japan (used in japan for less than a century actually) as Salmon is imported and not native to Japan. But retains its cooking methods, but uses different ingredients. By technicality, the Salmon used for breakfast would be in the same tier of authenticity as preperation of sushi rolls that dont use native japanese ingredients.
Great looking breakfast btw
There‘s some Bri‘ish in there too
If anyone is wondering why the food looks a bit weird it’s because of the lighting
Food tends to look better under warmer lights if I recall correctly
Matsuya breakfasts are the best. So much better than Yoshinoya