Cost of living in Osaka (Japan) is 23% cheaper than in Dublin (Ireland)
This comparison has some inconsistent or sparse data. It already provides a reliable comparison but it is not bullet-proof. It is based on 3,495 prices entered by 538 different people.
For example, to keep the same standard of living that would require €6,800 in Dublin you would need to make just about €5,209 (¥668,206) in Osaka.