It quickly becomes clear that this cash-only, sub-sidewalk spot in Hell's Kitchen is not the right choice for leisurely sit-down dining, but the line down the block is most certainly not for the atmosphere. It's for the authentic Japanese ramen with housemade, slightly al dente noodles in rich, soul-warming paitan chicken broth. When you arrive, add your name to the list and grab a menu, as a server will probably jot down your order as you're waiting to be seated. The menu is short, with just five or so ramen variations depending on location, but you can customize your noodles with extra toppings like a poached egg or pulled char siu pork. A stool at the bar will give you a front-row seat as the chefs work their magic.