On a different note, I've put graphs of recent age-specific employment changes (e.g., the "M" curve for female LF participation) on the following two
sites:

https://newjapanforum.wordpress.com/

http://japanandeconomics.blogspot.com/

The sharp rise in participation by younger women (initially ages 25-29, now including 30-34) jumps out, as does an overall muting of the "M". We can observe the rise of retirement among men, and over the past 6-7 years a slight reversal.

=====================
Michael Smitka
Professor of Economics
Washington and Lee University
=====================