Pat tuna steaks dry with paper towel to remove excess water.
In a medium sized bowl whisk together marinade ingredients. Add tuna and set aside. (2 tbsp each Ponzu,wasabi paste & sesame seed oil)
As tuna is marinating, In a small bowl add wasabi ginger sauce ingredients and let refrigerate. (Season to taste)
Heat skillet on medium-high with tbsp of oil.
Place sesame seeds on plate Roll tuna steak in sesame seeds coating evenly add more seeds if needed.
Add tuna to pan and sear (1 minute on the first side & 30-45 seconds on each additional side)
Remove to cutting board and slice into 1/4 inch slices.
Drizzel sauce on plate and voila ¡