Gyoza Kaikan Bandaisan

Satisfying locals' dumpling cravings for well over half a century now, this Ryogoku classic deals in thick, simple and delicious – you guessed it – gyoza. Big eaters may want to take part in the shop's 'gyoza challenge': any man who eats 100 of their signature pan-fried treats within an hour can walk out of the shop without paying a yen, while women need to finish 50 gyoza in 30 minutes to receive the same treatment. But beware: failure to complete the mission will result in a fine of ¥8,000. Less adventurous gourmands can take their time to savour the Bandai Ramen, a veg-filled mixture swimming in a soup made with both shoyu and miso.