You Get What You Pay for. OK I was being cheap. I bought the $4.00 tuna pieces from Woori Market and thought it will taste the same as the $8.00, but I was wrong. It didn't taste good. Next time when you make Negitoro Don, be sure to buy the good grade tuna. Lesson learned.
Negitoro Don (Grated Tuna with Scallions on top of Rice)
Masago with Uzura Sushi (Smelt Egg with Quail Egg Sushi)