The Bigmouth Sushi & Grill

The Big Mouth Sushi & Grill is a contemporary restaurant at Nelson Mandela Square in Sandton, Johannesburg, combining sushi, grilled food and the relaxed format of a modern diner. Its menu brings together culinary influences from around the globe, with options ranging from fresh seafood and gourmet burgers to sushi and charcoal-grilled dishes.

The kitchen’s central feature is a Josper grill, a charcoal oven that gives hot dishes a robust, smoky, braai-inspired character. This makes the restaurant suitable for diners looking for both raw and cooked preparations, with sushi and seafood sitting alongside burgers and grilled plates. The menu is broad enough to support different dining preferences, from a casual meal to a more leisurely restaurant occasion.

The interior has a polished urban feel, balancing black steel shopfronts with a white marble sushi bar, blue seating and brass details. The design leads out towards Nelson Mandela Square, connecting the dining room with one of Sandton’s established restaurant settings. The combination of sushi-bar detailing, grill-focused cooking and diner-style comfort gives the venue a varied identity rather than limiting it to a single cuisine.

Drinks include classic cocktails, fruit-led mixes, sake-based combinations and frozen sangria, alongside wine, beer, whisky and other spirits. The cocktail list covers familiar formats such as a whisky sour, margarita, mojito and caipirinha, as well as drinks built around ingredients including litchi, lemongrass, watermelon and ginger beer.

The Big Mouth suits diners seeking a mixed menu in a smart but informal setting, especially groups with different tastes. Sushi fans, seafood diners, burger enthusiasts and those looking for charcoal-grilled flavours can all find the restaurant’s style represented on the menu. Its location at Nelson Mandela Square also makes it a practical choice for a meal within Sandton’s central shopping and dining precinct.