In a large bowl, whisk together eggs, soy sauce, sesame oil, sea salt, and sesame seeds. Slowly add flour, whisking until it is well integrated.
Fold in shredded Brussels sprouts, green onions, and shrimp.
Heat canola oil in a cast iron pan. Once oil is hot, scoop batter, about ¼ cup at a time, to form pancakes. Cook on each side until sides start to brown, then flip, and cook on other side. Transfer to a plate.
Once pancakes are done, quickly whisk together the ingredients for the sauce.
Drizzle sauce over pancakes to serve.
Recipe by Things I Made Today at https://www.thingsimadetoday.com/2014/04/07/okonomiyaki-savory-japanese-pancakes/