As per International Monetary Fund (IMF) 2019 estimates, the GDP (nominal) of Japan is USD 5,154,475 million. This GDP (nominal) is around 5.91% of Entire World’s GDP. Currently (2019), the world rank of Japan is 3 in terms of GDP Nominal.
However, as per 2018 estimates by World Bank, the GDP (Nominal) of Japan is USD 4,970,916 million. As per World Bank Estimates, the global rank of Japan is 3.
On the other hand, as per 2019 estimates by International Monetary Fund, the GDP (PPP) of Japan is USD 5,747,496 Million. This is 4.05% of World. Japan on this basis has a global rank of 4.