|Released||May 13, 2020|
R-21 is the second solo photobook by Yamagishi Riko. It was published on May 13, 2020 by Odyssey Books. The photobook comes with a bonus 33-minute making-of DVD and L-sized photo.
The photobook was exclusively available through Odyssey Books, the Hello! Project Official Shop, Shosen book stores, and at Tsubaki Factory Concert Tour 2020 Haru CAMELLIA concert venues. Pre-orders through e-LineUP! Mall ran from March 28 to April 12, 2020.
- The photobook was shot in Okinawa over two days.
- Fans who pre-ordered the photobook by 23:59 on April 12 were selected by lottery to receive their L-sized photo with Yamagishi Riko's autograph.