On Đề Thám — District 1's busiest backpacker street — Mayonaka keeps a dark room: dark wood, black-and-gold walls, low light. Not an old-style quiet tea room, but a night dining room: an open counter, chefs facing the diners, dishes coming out till midnight.
The kitchen leans fusion: crispy rice with toppings instead of only classic nigiri, soft-shell crab salad, saba mackerel lunch sets, mocktails alongside sashimi. The merchant's menu speaks in two colors — black lacquer and gold script — exactly the 'midnight' the name promises.
After 22:00, most sushi kitchens in central Saigon go dark — Mayonaka's counter stays lit. That is the whole proposition: fusion sushi, an open counter, and a kitchen that treats midnight as a normal dinner hour.