Nirvanam is a halal-certified South Indian restaurant with multiple branches including Kamiyachō, Ginza, and Ariake in Tokyo. It’s a great spot for travellers looking for authentic flavour—try their lunch buffet (with curries, dosa, bean soups, etc.) or dinner biriyanis and tandoori dishes. The restaurant doesn’t use pork or non-halal meat, many vegetarian & vegan options are available, and kitchens/utensils follow halal standards. Located in upscale districts (Toranomon, Ginza, and Ariake), the vibe is elegant yet comfortable—good for business lunches or relaxed meals while sightseeing.