When the girlfriend was living in Japan I stayed for 89 days and then went to Taiwan (amazing country, highly recommended) and came back for another 87 days and nobody cared. I guess if you did this a lot it would be an issue but you’re reasonably fine to do it once I think. I was not working but I did have “free” accommodation in the smallest apartment I’ve ever been in so I’d be more concerned about this if I was actually breaking the rules and didn’t have a reason to be there.