Member Nogizaka46 Ikoma Rina who will graduate from the group, will
release a memorial book titled 'Tatsu [立 つ]' on 28 April 2018.
This memorial book will be published by Nikkei Business Publications. The front cover of this book shows Ikoma wearing the 'Synchronicity [シ ン ク ロ ニ シ テ ィ]' costume standing in front of a door.
In this book will contain the latest messages and photos of Ikoma. In addition, the book will also include a 6 and a half year Nogizaka46 journey that grew as a group through Ikoma's perspective as well as 6 sets of years of Ikoma's journey in the group. This book will also include the comments of Akimoto Yasushi's producer about Ikoma's figure.
Before the general release, this book will also be sold during the Ikoma graduation concert to be held on April 22, 2018 at Nippon Budokan.