In a spice grinder or coffee grinder, pulse the nori strips until they’re broken down — but not powdered. You want some flakiness to remain.
Add the sesame seeds, bonito flakes, salt, togarashi (or cayenne), and stevia. Pulse just until combined and uniform.
Store in an airtight spice shaker or jar. It’ll keep well in a cool pantry for about a month (if it lasts that long).