Hachiōji is 49% more expensive than Zaragoza. Apr 2019 Cost of Living.
WARNING! This comparison is based on only a few data points. At this point it is only a guess. It is based on 223 prices entered by 20 different people.
For example, you would need at least €3,567 (¥448,988) in Hachiōji to maintain the same standard of living that you can have with €2,400 in Zaragoza.