Shred the cabbage thinly.
Peel and clean the shrimp thoroughly.
In a bowl, mix eggs, flour, and water.
Add the cabbage and shrimp to the batter and mix well.
Heat some cooking oil in a pan.
Spoon the batter into the pan, shaping it round, and cook on medium-low heat until both sides are golden brown.
Drizzle okonomiyaki sauce and mayonnaise on top.
Finish by adding bonito flakes and chopped green onions.