Unless Japan's birthrate picks up, its population is slated to fall by a lot more than 2% from its peak. Try 50% or more. A birthrate below 2.1 children per woman leads to extinction.
This is true, Japan's population pyramid [1] looks way more dire that Russia's [2]. Russia's does seem to suggest shrinkage after the big generation born in the 80's passes away, but oscillation afterwards. Japan's is an inverted pyramid.
