The publication date is listed as Reiwa 5. There are creases on the cover from being flipped through. I purchased this recently and only solved a few of the problems I found difficult, so the inside is relatively unused. However, there is writing on one and a half pages. I will erase the pencil markings, but the edge of this page is cut, so I will sell it at a low price only to those who don't mind minor imperfections, including any oversights. This is an arithmetic problem book for junior high school entrance exams, which organizes basic points and supports learning with a wealth of problems. - Title: Arithmetic Plus One Problem Collection - Author: Toshiaki Mochizuki - Publisher: Tokyo Shuppan - Target Grade Level: Elementary 5th and 6th grade - Content: Problem collection for junior high school entrance exams - Features: Organizes basic points and allows for learning using a large number of problems Thank you for looking.