system
Given the following post, respond as if you're commenting on Reddit:
human
[Bleach] So Ichigo has just died of natural (or mundane) causes, what now?

So will he appear in Soul Society with his full powers? If so, would he be able to officially join the Shinigami divisions, as a rookie or directly as a captain? Is the procedure the same for other exceptional living humans like his father?
gpt
If you aren't trapped as a hollow or parakeet or whatever when you die, you show up in Soul Society very shortly thereafter.  Parakeet-kid remembered his mortal life, but this seems to be inconsistent, with other characters (e.g Zaraki) talking about how they just woke up in Soul Society one day with no memory of how they got there.

Keeping your powers seems inconsistent as well, but there are a handful of people (again, Zaraki is the prime example) show do indeed show up in Soul Society monstrously powerful.  

So, it's possible, but not guaranteed, for Ichigo to just show up with all his powers and memories intact.