Throne’s patrilineal inheritance is gender distinction, not discrimination.

Verification that the child’s soul is handed down only from the father. The soul is handed down by sperm, and the egg dose not have that function.

The soul is the power to live. Sperm move, because sperm are alive. The egg is just object. This can be seen in the fact that sperm have a lifespan of seven days, while eggs have a lifespan of only one day.

This short lifespan is the same as the organ to be transplanted. The transplanted organ enters the recipient with the soul and function again. Eggs also become creatures with sperm with souls.

A man can put his soul into sperm because he knows the moment of ejaculation. A woman cannot put her soul into an egg, because ovulation is not conscious.

The gender of the child to be born dose not matter. As a result, both men and women can be emperors. There were eight female emperors in history in Japan.