Are you a natural Hermit? I think I would love to live somewhere where I have minimal communication with everyone around me. I would also love to visit family and friends back home maybe once a year at most. I already kind of do that but at least I would have an excuse.
I’m not a party animal exactly but also not a hermit. The reason I wanted to go home was the racism and xenophobia of Japanese people (which mostly isn’t aggressive but that doesn’t mean it doesn’t grind you down over time)
On the other hand I think as a white guy, experiencing that kind of arrogance, unwarranted superiority of the majority race, while at the same time being able to find all the skeletons in the closet (because behind the nice veneer, Japan is quite the unrepairable mess) was very enlightening so I am glad I didn’t go home early.