It's most notable that the popultation growth has slowed down a large amount in the last few years.

Where the population increased by over 10 million from 1960 to 1970 it is barely trudging along with an increase of 0.20 million from 2000 to 2010. This is by no means a bad thing as Japan is one of the most densely populated countries in the world and could benifit from less people moving in.