During the day Sumiko Iwamuro is a lovely 83-years old lady working in the restaurant in Tokyo, but after dark, she becomes a Guinness World Record holder for The World's Oldest DJ ! If you are a food lovers, make sure to visit her restaurant after 4 P.M. when Sumiko usually starts her job and taste her delicious dumplings. Why dumplings ? Because 50 years experience of making it is like a quality assurance certificate. For a music lovers, the most interesting part begins right after closing the restaurant's doors, at that time Sumiko is usually heading to the club. As she admit in one of the interviews, she is able to stay awake up to 4 A.M. and she admire her managers' booking skills which allows her to play during a prime-time, between 0 and 2:00. Obviously healthy reasons are not the only factor. In fact, she is smashing hard the Japanese Dancefloors with ebm, energetic house and techno gems, leaving no mercy for her pupils.