I don't actually have any idea since I'm not an insider with access to any secret knowledge, but I do notice these things:

* Satoru Iwata really liked the name Satoshi
* His work at Nintendo showed talent in the same programming languages used to create Bitcoin
* Nintendo oddly had some cypherpunk stuff going on under his time at the top - see the item codes in Animal Crossing for example
* His position and experience also suggest deep understanding of currency, system architectures, cybersecurity, network scaling, etc
* No more Satoshi after him - coincidence? I have no idea, it's just fun to speculate