Z-Kai Grade Up Problem Collection, Elementary School 6th Grade Science Price: 1100 yen Edited by Z-Kai Editorial Department #Entertainment/Hobbies #Language/Reference Books Z-Kai Grade Up Problem Collection, Elementary School 6th Grade Social Studies Price: 1100 yen Edited by Z-Kai Editorial Department #Entertainment/Hobbies #Language/Reference Books Although unused, please refrain from purchasing if you are nervous about home storage. Please note that we will ship it as is in a宅配袋 (delivery bag)!