Sayashi Riho Birthday Event ~Sayashi no Koto, Itsu Iwau no? Ima Desho!!/ Sato Masaki Birthday Event ~14 sai nau nauuuu!!~ (鞘師理保バースデーイベント〜鞘師のこと、いつ祝うの？今でしょ！！〜 / 佐藤優樹バースデーイベント ～１４才なうなぅーーー！！～) is a fanclub DVD featuring the 2013 birthday events of Morning Musume members: Sayashi Riho and Sato Masaki. The DVD was sold only to Hello! Project Fanclub members and had a deadline to pre-order it by July 26, 2013.