"Junjō U-19" (純情U-19, "Innocence Under 19") is Japanese idol group NMB48's third single. It was released on January 25, 2012. This is the first single to feature members from Team M which was formed on January 26, 2012. The single was released in four editions: Type-A, Type B, Type-C and a Theater edition, all of which contains different B-sides. Upon its release "Junjō U-19" topped the Oricon weekly chart and Billboard Japan Hot 100.