Gender
Nature, Sex
Each life has a soul, and that soul determines what gender you are. It's not so much about your body parts, it's more about what's inside that matters.
せい, しょう
None
None
Once you've decided what your gender is, the Shougun (しょう) comes to your house, lays his saber (せい) on your shoulders, and then it's official! It's in all the newspapers, there's a parade, and everyone is patting you on the back because you did it!