Masu Japanese is a Japanese restaurant on a high-end street in Hoan Kiem, Hanoi, serving sushi, sashimi and wagyu shabu-shabu. Its menu covers uni wagyu sushi, crab ramen, wagyu foie gras rice bowl and eel rice bowl, along with omakase and pufferfish dishes. The restaurant has tatami-style private rooms and family rooms, and staff attend to guests closely. Meal costs are on the high side.