The name sets a modest bar. What runs behind it on 10th Street East is a kitchen working two cuisines at full depth — a Japanese sushi bar turning out special rolls, hand rolls, poke bowls, maki sets, and nigiri, and a Thai line of pad Thai, curry, and fried rice holding its own beside it. Yummy Yummy has cooked both halves in downtown Owen Sound since 2011, and the appeal has stayed constant: a single order can pull together raw fish, a hot noodle plate, teriyaki off the grill, and a curry bowl, with no one cuisine crowding out the rest. Sushi leads the menu by volume, but the curry and noodle list runs deep enough that plenty of orders never touch the fish at all.
The sushi bar explains itself fastest through its two named rolls. The Yummy Yummy Roll lays red tuna across a maki packed with shrimp tempura, crab, avocado, and cucumber, then finishes it with spicy mayo — the house signature, and the most direct read on what the kitchen does with fish. The Owen Sound Roll is the showpiece: tempura lobster, avocado, cucumber, fish eggs, and eel sauce, a roll that takes the town's name and builds something big enough to anchor a shared spread. Around the two of them the sushi side fans out into hand rolls, an avocado sushi pizza, sushi-bar sets, grilled shrimp yakiebi, and tamago nigiri — enough small plates and add-ons that a table can graze its way through the order rather than settle on a single dish.
The Thai half carries real weight. Bangkok Pad Thai heads a noodle section that runs through a curry-tossed pad Thai and a pan-fried udon, while the curry lane stretches across green, red, and golden, plus a thick curry ladled over tiger shrimp and a South Thai fried rice for the table that wants something quieter. This is less a sushi place with Thai extras than two full menus under one name, and the poke bowls are where they meet in the middle — Hawaiian, tuna, and salmon builds borrowing the sushi bar's fish, the Hawaiian piled with crab, mango, and seaweed salad, all answered by a marinated Buddha tofu bowl in ginger dressing for the vegetarian end of the table. A hot-and-sour soup and a short run of agedashi tofu and tempura appetizers open the order before the mains land.
All that range makes the kitchen an easy one to feed a mixed table from. Plant-forward diners get more than a token side — the Buddha tofu bowl, agedashi tofu, an avocado sushi pizza, and vegetable fried rice each stand on their own — while chicken teriyaki and chicken katsu give a cautious eater familiar ground beside whoever ordered the lobster roll. Prices sit in everyday territory rather than special-occasion, so a household can build a full order across both cuisines without it turning into an event. The whole table eats from one trip to the counter, and that breadth is the simple reason a menu this wide settles into a standing weeknight habit.
Yummy Yummy works the way a downtown restaurant has to. It sits in the River District, a block off Owen Sound's main commercial stretch, open from late morning into the evening seven days a week, with an online ordering page that keeps the takeout and delivery side moving. The menu has only grown more useful for the way the town actually eats — a sushi order and a curry order, side by side, out of one kitchen, without a drive past the harbour to find either. Owen Sound's downtown empties early; an order placed by mid-evening and picked up on 10th Street East is the version of this kitchen most of the town actually uses.