One of my friends from Japan told me to never mix wasabi and soy sauce when eating sushi. It’s like mixing ketchup, mustard and mayo together before you put it on a hamburger. It turns it into a one noted sauce instead of multidimensional flavors. The more I eat sushi this way the more I understand what he’s talking about (especially with good quality soy sauce and fresh wasabi). Give it a try and let me know what you think.