SHIZUOKA - An 88-year-old man and an 84-year-old woman based in Yaizu, Shizuoka Prefecture, have been certified by Guinness World Records as the world's oldest professional singing duo. Shin Egao Stars, formed by Hachiro Minato, 88, and Kaori Chigusa, 84, challenged the record in the oldest singing duo category. An official Guinness World Records adjudicator reviewed their record and assessed a live singing performance. "You have successfully been certified by Guinness World Records. The duo, long familiar to audiences in Yaizu, is now beginning a new chapter as Guinness World Record holders.