Nadai Unatoto Asakusa-ten is a Japanese restaurant near Asakusa Station that serves unagi donburi. Each set comes with a clear eel soup, kimchi, and potato salad. Customers buy tickets from a kiosk and pay with cash or Suica. Around 11 a.m., a line of about 10 groups moved in after roughly 20 minutes, and the interior is a small space with counter and table seating.