Cost of living in Naha (Japan) is 50% more expensive than in Aden (Yemen)
WARNING! This comparison is based on only a few data points. At this point it is only a guess. It is based on 155 prices entered by less than 5 different people.
For example, you would need at least 383,235 ﷼ (¥173,555) in Naha to maintain the same standard of living that you can have with 256,000 ﷼ in Aden.