Morning Musume Sayashi Riho Zenshuu 2011-2015 (モーニング娘。鞘師里保全集 2011－2015; Morning Musume Sayashi Riho Complete 2011-2015) is Sayashi Riho's fifth solo photobook, and her last as a member of Morning Musume. It was released on December 25, 2015.
"The five year trail of Morning Musume '15's ace Sayashi Riho in one book!!
Sayashi Riho announced her graduation from Morning Musume at this year's countdown concert. Her huge decision, despite only being 17 years old, has shocked the idol world.
Before becoming center she successfully passed the audition, and led the legendary group as its ace. Her strong presence, which she has demonstrated wholeheartedly, will be missed with her premature graduation, as well as her voice. With a presence such as Sayashi Riho these past years in Morning Musume and also with her great impact on the idol world, it can be said, with no exaggeration, that a new wind has been blown. This girl's 5 years of radiance are fully packed in one book accordingly, to be urgently released on December 25 just before her graduation!
Photographed by our company since 2011, a large number of shots have been carefully selected from about more than 50,000 photos. The process of a girl growing up into an adult, every day Sayashi Riho has moved forward sparkling ― In addition, there are a few comments and new photos made by herself. This is the definitive edition of Morning Musume's Sayashi Riho!!"
- Sayashi announced the photobook on her blog on December 1, 2015.
- A release event was held on December 24, 2015 at Fukuya Shoten in Shinjuku.