The three main types of Japanese castles are mountaintop (yamajiro), flatland-mountain (hirayamajiro), flatland (hirajiro). As you can easily tell, the castle types are named according to their location. That is because a castle's location is most important for defensive reasons. Though each place has its good points, there are also downfalls to each location.
In this tour, you can find more information about the castle of your choice by clicking on the type of castle it is: