Toast the sesame seeds and Sichuan peppercorns: In a dry skillet over medium heat, toast black sesame seeds, white sesame seeds, and Sichuan peppercorns until fragrant. Remove from heat and let cool.
Prepare the nori seaweed: Using kitchen scissors, cut or tear the nori sheet into small pieces. Set aside.
Grind the toasted sesame seeds and peppercorns: Using a spice grinder or mortar and pestle, coarsely grind the black sesame seeds and Sichuan peppercorns.
Grind the orange peel: In the same grinder or mortar and pestle, grind the dried orange peel into a fine powder.
Combine the ingredients: In a bowl, mix the ground ginger, ground black sesame seeds and peppercorns, ground orange peel, red chili flakes, and cut nori seaweed. Stir well to ensure even distribution.
Store the Shichimi Togarashi: Transfer the homemade blend to an airtight container or jar with a tight-fitting lid. Store in a cool, dry place away from direct sunlight.
Enjoy and use as desired: Sprinkle this versatile seasoning over noodles, rice dishes, soups, grilled meats, or roasted vegetables to add a spicy and flavorful kick. Adjust the amount according to your desired level of spiciness.