OK I misremembered some small details. While the .exe in the game directory is called "game.exe" it instead opens up a process called "nwjs". Also, there are only 7, not 8 processes.
This is a snapshot of my task manager immediately after opening the game, so all of these subprocesses are here from the beginning.
Like I said, sometimes this is normal, and maybe this is just an example of that happening here.
I made this discovery when I was trying to use Cheat Engine to speed things up. I thought there was only one program to attach and scan, but as it turns out, there are multiple.
I attached to all of these processes individually, first using the speedhack option because it felt like the simplest and easiest approach to making the resources gather faster, since all you have to do is wait. At least one of these subprocesses seems legit, since when I speedhacked it, it sped up the animation of poor paizuri girl, so she started panting cartoonishly fast lol.