Birth rate
As of 2017, Niger has the highest birth rate in the world with 49.443 per thousand people. 
Japan has one of the lowest birth rates in the world with 8 per thousand people.
While in Japan there are 126 million people and in Niger 21 million, both countries had around 1 million babies born in 2016.
Demographics of Russia
In 2012, the birth rate increased again. Russia recorded 1,896,263 births, the highest number since 1990, and even exceeding annual births during the period 1967–1969, with a TFR of 1.691, the highest since 1991. (Source: Vital statistics table below). In fact, Russia, despite having only slightly more people than Japan, has recently had nearly twice as many births as that country. The number of births was expected to fall over the next few years as women born during the baby bust in the 1990s enter their prime childbearing years, but this didn't occur thanks to the continued growth of the TFR. The figures for 2013-2015 again showed around 1.9 million births, about the same as in 2012, but because the number of women of childbearing age is dropping, especially for those in their early 20s, the TFR actually rose to 1.777, which places Russia at first 9 or 10 countries out of 50 developed nations, and at 6th place in Europe.