Shred the cabbage and slice the green onion.
In a bowl, mix the shredded cabbage, green onion, eggs, pancake mix, and water.
Heat cooking oil in a pan and spread the batter flat.
Cook on medium heat until both sides are golden brown.
Drizzle okonomiyaki sauce and mayonnaise over the cooked okonomiyaki.
Top with bonito flakes and seaweed flakes.