Morning Musume celebrated their tenth anniversary yesterday with a concert at Yokohama Arena, bringing an end to the Hello! Project spring tour. The weekend was marred by an accident on Saturday, when a 35-year-old male fan fell from a 3rd-tier balcony and had to undergo emergency surgery. But the mood was upbeat on Sunday, as former Momus member Konno Asami (19, photo left) made her first appearance on the tour. She is entering the prestigious Keio University this year. The show also marked the first on-stage look at new member Mitsui Aika (14) and the graduation of Country Musume members Asami (22, photo center) and Miuna (19, photo right). Mitsui introduced herself as the first member from Shiga Prefecture and her arrival brings the lineup to sixteen members, though leader Yoshizawa Hitomi (21) is graduating in April. The group performed their new single, "Eigao Yes Nude", due for release on February 14.