Cost of living in Miyazaki (Japan) is 98% more expensive than in Abuja (Nigeria)
This comparison is lacking data. It provides a decent comparison, but it is not yet reliable. It is based on 231 prices entered by 16 different people.
For example, you would need at least 2,935,711 ₦ (¥908,545) in Miyazaki to maintain the same standard of living that you can have with 1,480,000 ₦ in Abuja.