User blog comment:God of nothing/What are Shinigami?/@comment-8295743-20130928171203

In many East Asian religions, the world of the dead/underworld is not too different from the living world, in terms of your general existence. You still need food, water, money, shelter. I can't remember reading anything specific about denizens of the underworld being able to still procreate. It's very likely that new souls are created in Soul Society first, before dying there and reincarnating on Earth.