A set of 11 textbooks from the "Chiryoku no Sebone" (Intellectual Backbone) series, covering arithmetic and Japanese language. - Series Name: Chiryoku no Sebone No. 1-11 - Subject: Arithmetic - Subject: Japanese Language - Material Type: Textbook - Quantity: Set of 11 books - Publisher: Kashikoi Erabikata Some DVDs are opened (9 discs for arithmetic, Japanese, and science). The binder is partially torn and stained. There is writing on one page of the Japanese language textbook (see photo 9). Thank you for looking.