To prove that there aren't many people in Japan who find this type of behavior acceptable. It seems like you can't read Japanese, but the link I posted above shows how there's a considerable amount of people who think it's understandable to control your partner. They seek out advice, but when you seek for advice on the west everyone will absolutely say that you should break up with this type of guy, and cancel culture will also do its work there. In Japan, however, you'll have a portion of people who will say that it's wrong, and another portion who'll say it's normal to control your partner because it makes no sense to speak with people from the opposite sex. Have you ever went to school or university here? I did, and most people absolutely refuse to speak with someone from the opposite sex unless there's a sexual interest there. I don't know why you're trying so hard to deny an issue that even Japanese people complain about, specially when they go to other countries and realize that. I can't find any other explanation apart from "Japan is perfect! How dare you say Japan has issues? What a miserable life you have!"