These are reference books for students aiming for universities like Sankin Koryu. I used these books to go from an E rating to successfully entering Ryukoku University in six months! I'm sure they'll be helpful for other students preparing for exams. * Easy-to-Understand Modern Japanese * The Strongest Modern Japanese * New Modern Japanese Level-Specific Problem Collection 3 * Yoshiyuki Yagyu's The Rules Modern Japanese Problem Collection 2 ※ The covers have been removed, so the books themselves have some scratches and stains. Please be aware of this. Individual books are available for 1000 yen each.