Gender Wage Gap in Japan

Came across this from the travel guide Lonely Planet when I was doing some research on Japan.
1)There's some bit at the top about how Japan's population is fast shrinking and ageing, not unlike Singapore, and with an equally low TFR.

2) Read about the situation on women there. There's some mention about the wage gap there btw men and women -- only 66%.  Those who have done the Hana Rosin Compre can use this statistic to support Rosin's claim about the wage gap argument. Seems like the Jap society is not just xenophobic but sexist as well.....
Note there's a wage gap btw men and women as well in the civil service, but this is due to men having served NS, hence seen as a compensation for their delayed entry into the workforce, not so much a sign of discrimination.