Here is at a glance of Sake Classifications.   

Sake classifies into two categories based on ingredients - Junmai or Alcohol-added sake, and divided further based on rice polishing ratio.   "Add Alcohol??" Fret not... Distilled Alcohol is added to enhance the flavour & aroma, often offering light texture.  

Hope it helps you to find out what is your preference and assist you to choose your next bottle!