Feels like there are tons of cultural differences involved. Maybe you are not aware of them?

Cultural differences are usually not changeable. I mean, you cannot change all people at once, obviously. Most times you cannot even change that one special person.

You can only be open to accept that one specific person as they are. And you need to talk about these things more, and much more explicitly, than about some other general topics.

Don’t know if this is helpful, but I must admit that I don’t know the Indian or Japanese cultures enough to really answer your questions.