In a small ramekin, combine lemon, dijon mustard, wasabi, date syrup, avocado mayonnaise, and white wine vinegar. Mix well and set aside.
On another small ramekin, combine lemon, mirin, coconut aminos, date syrup, grated ginger, and grated garlic. Mix well and set aside.
Dice the sushi-grade tuna into 1/2 inch cubes.
In a large bowl, combine ahi tuna with wasabi aioli and coconut amino sauce.
Refrigerate for at least 30 minutes before serving. Garnish with sesame oil, serrano peppers, and furikake.