Slice green onions and cut imitation crab in 2 inch pieces.
Chop shrimp in small pieces.
Microwave butter and melt.
To make the filling, add cream cheese, imitation crab, green onions, chopped shrimp, ¼ white onion, ½ tablespoon mirin, ½ tablespoon sake, 2 tablespoon melted butter, sliced green onions, and 1 teaspoon salt.
Whisk one egg. Egg wash is used to seal the egg roll wrappers.
For one egg roll wrapper, scoop 2-3 tablespoons of filling. Start rolling from the bottom really tightly. Fold the right flap in and fold the left. Add some egg wash at the top and finish rolling.
Add corn oil in a pot. Heat to low-medium. Once the oil is hot (325 degrees), cook 3-4 egg rolls in the pot. Cook for 10-12 minutes until golden brown.
Rest the egg rolls on a paper towel or wire rack for the oil to drip.
Cut egg rolls in half and garnish with green onions and sesame seeds. Top with teriyaki sauce and enjoy!