Eat your way from konbini to conveyor-belt sushi

Tokyo may be the best food city on earth, and you can eat superbly at every price. Start with the surprisingly excellent convenience-store onigiri and bento, graduate to a steaming bowl of ramen at a counter (around ¥800), try conveyor-belt sushi where plates are priced by colour, and brave an izakaya pub for small plates and a drink. The famous Tsukiji Outer Market is a feast for browsing and street snacks. A food tour is a great way in, or simply follow the queues of locals. This is where Tokyo gives the most for the least.