Principio is an Italian restaurant in Azabujuban, Tokyo, a 4-5 minute walk from Azabujuban Station. It serves a course menu built on seasonal ingredients and fresh pasta, including two handmade pastas such as sciaratielli and tagliatelle, with the main meat grilled over charcoal. Wine is selected to match the food, and coffee or tea follows the course. Seating is closely spaced.