|Solo Photobook by Yamagishi Riko|
|Released||April 27, 2017|
Riko (理子) is the first solo photobook by Yamagishi Riko. It was published on April 27, 2017 by Wani Books, including a making of DVD.
- A preview of the photobook was published in the June 2017 issue of Up to Boy released on April 22, 2017.