"Hitotsubashi University Mathematics 20 Years [9th Edition]" Kyogakusha Editorial Department 2004-2023 There are creases and a few places with writing in black pencil, but they have been carefully erased with an eraser. The obi (sleeve) has wrinkles. Overall, there is little sign of use, and the contents are in good condition. Please refrain from purchasing if you are sensitive to used items. Thank you. #KyogakushaEditorialDepartment #Books #Nature/Mathematics #Hitotsubashi #HitotsubashiUniversityMathematics #Akahon (Red Book - a type of exam prep book)