"Koukou Suugaku A wo Hitotsu Hitotsu Wakariyasuku. Power Up Ban" (Understanding High School Math A, One Step at a Time. Power Up Edition) Hideo Kojima Price: ¥1000 #HideoKojima #Hideo_Kojima #Book #Nature/Mathematics (Note) Answers are written up to Chapter 1, Section 15. Erasable markings have been erased. Only the markings on photos 4 and 5 remain and could not be erased. Please cover these areas with paper or similar when using the book. There are no markings in Chapter 2 and beyond. Please consider this information before purchasing. Thank you very much. m(_ _)m"