Mr. Mimatsu thought that he should keep track of how this volcano grew.  He was looking at it through a window that had wire mesh  in it.  The window looked like graph paper.  

     He got an idea.  He decided to show how much the volcano was growing by recording it on graph paper.  Each month he made a new line on the graph paper to show how much taller the volcano was.  

     This volcano became known as the Showa Shinzan Volcano.