Cost of living in Iwaki (Japan) is 61% more expensive than in Zhuhai (China)
WARNING! This comparison is based on only a few data points. At this point it is only a guess. It is based on 39 prices entered by 5 different people.
For example, you would need at least 元19,372 (¥326,879) in Iwaki to maintain the same standard of living that you can have with 元12,000 in Zhuhai.