Sometimes I have to use a recipe as a starting point for what I prepare. I did this recipe, substituting darker miso for light, and chopped red onions for scallions. I also had only a few drops of mirin, so I added a splash of white wine. That's what you have to do when you like the ingredients in a recipe, but do not have all of them on hand.
I always skin the salmon, making it 1000% easier to serve and reducing the cooking time a bit. Finally, I use a pyrex baking dish with a very light coating of olive oil, rather than lining a baking dish with aluminum foil. No wasted aluminum foil and just as easy cleanup.
Now I want to go out and get the missing ingredients and prepare the recipe more or less as given. Betcha it will be excellent!