Cut the Tuna: Chop the tuna into small pieces.
Mix Ingredients: In a bowl, mix soy sauce, yuzu juice, and sesame oil.
Add Flavor: Stir in wasabi, ginger, and ponzu sauce.
Combine Tuna: Add tuna to the mixture and mix gently.
Improve Texture: Fold in avocado and chives.
Keep It Fresh: Place the bowl on ice to keep it cold.
Shape the Tartare: Use a ring mold to make a neat shape.
Garnish and Serve: Add tobiko on top for extra taste.