This is a book cover from the Marugoku series, purchased at the Correction Exhibition. I believe the size is a Japanese paperback (bunko) size, but I'm not entirely sure, so please check the photos. I took it out of the bag, but it's new and unused. I've kept it carefully stored away without using it. #Marugoku #HakodatePrison #HakodateCorrectionalInstitution #BookCover #CorrectionExhibition