Announced on Sakura's blog post on Monday 18th April:
http://www.ameblo.jp...2151567014.html
http://blog-project....a-sakura/247881
Confirmed by Wani Books on Tuesday 19th April:
https://www.wani.co....ent.php?id=5067
The book will have two covers including a limited edition cover both of which have yet to be revealed:
http://wani-special-...detail/48390-00
The book will feature photos taken at a studio, in a school building, and at the sea.
Book description via akarinxxx on Sakura's thread:
Photographer: Nishida KokiSakura's photobook will contain:
Shots of her in school uniform, school swimwear & tennis wear where the background will be in school. While there will also be shots that clearly show her mature expressions as lady who is in her third year of high school.
Cost: 3000 Yen
Edit:
Offshoot photos from Sakura's blog on Monday:
Edit:
Limited Edition Cover
Edit 2:
Bonus Photos
HMV
http://www.hmv.co.jp.../detail/7038107
7net
http://7net.omni7.jp/detail/1106657668
Wani Special Edition
http://wani-special-...detail/48390-00
Edit 3:
Handshake event on Tuesday 7th June the Fukuya Shoten comic book store in Shinjuku Sabunado:
http://www.fukuya-sh....jp/event/#6364
http://www.helloproj...9ec9e24ef2eae2/
Edit 4: New off-shot photo posted up on the UTB Twitter page
https://twitter.com/...658636389289984
Edit 5:
Bonus Photo
Hello!Project Official Shop
Edit 6:
Book release event news and video links:
http://www.mantan-we...200024000c.html
http://news.dwango.j...7/92464/idol/1/
http://news.tv-asahi...160607_260.html
http://www.news.myna...2016/06/07/434/
http://www.tokyo-spo...ainment/550167/
http://www.hochi.co....OHT1T50150.html
http://www.oricon.co...s/2072958/full/
http://www.jiji.com/...k=g160394&g=ent