Japanese women spend 4.6 times longer than men in child-rearing and sleep the least in both the G7 and OECD. Japan is one of the few countries where women sleep 1 hour and 43 minutes less than men (448.4 minutes), and the gap is the widest in the OECD(From the data in the photo).
In Japan, the wife does most of the housework.
Most of the childcare is also done by the wife.
And she has to work.
Are there any advantages for women to get married?