- He will sleep during night like all of us and active during the day
Developers/coders are typically stereotyped of having inconsistent sleeping patterns, especially when it comes to big projects. Even though I appreciate the effort you've put into the post, and the images it's nothing more than speculation.
Don't know where you read that satoshi is from Japan?even if he has a Japanese's origin , he could be living in the USA right now.
Edit : removed links of images (it didn't appear rapidly)
People assume it, because "Satoshi" is a Japanese name.