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.
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