Preheat oven to 350 degrees F and grease an 8x4" loaf pan. Line with parchment paper if you want to remove bread completely from the pan after baking.
In a large bowl, whisk flour, salt, baking soda, and 3 tablespoons of hojicha powder.
In a separate bowl, mash your bananas (with a fork, by hand, whatever works).
Mix your remaining wet ingredients with the mashed bananas: eggs, brown sugar, butter, sour cream, and vanilla bean paste.
Stir wet and dry ingredients together until you have a batter with no dry lumps remaining.
Pour batter to your prepared loaf pan and sprinkle the top with turbinado sugar (if using).
Bake for one hour. Check for doneness by sticking a wooden skewer down the center of your bread. If the skewer comes out with wet batter, continue baking until the skewer comes out clean, up to 10-15 minutes more.
Allow banana bread to cool to room temperature, then slice and serve.