A compact storefront adjoining a pet shop, the original Katsu-ya represents the everyday brilliance of Valley sushi. Without fail, there’s a line outside. Inside, connoisseurs cluster at an elbow-burnished counter. This is where Katsuya Uechi began accentuating the fish’s clean simplicity with contrasting textures, temperatures, and spices. Eating the fiery Cajun halibut cheeks and the nuggets of spicy tuna on crispy rice, you’ve found your way to the source.