Visa – 2 adults (in relationship, not married currently) with 1 child (19 months old)

Hello,

If you wanted to move to Japan from the UK and you had a partner but you’re not married currently and a child that is 19 months old

How would you go about that? What visa would you need? And what visa would they need?

Thanks in advance!

EDIT: I am ‘retired’ – what I mean when I said this is that I do not have the need to work. I make money through investments.

Yes, I can speak basic Japanese – I am still learning and have a great love for the country. Just because I am asking questions about the visa/ immigration system doesn’t mean I am just deciding to live in Japan on a ‘whim’

It seems that a business visa is the most applicable option – I am just wishing to understand that better

I understand that my information may have been vague and what I wrote was read into as what it was but I don’t understand all of the downvotes on my comments as well as the ‘gatekeeping’ mentality, i just came to ask questions, if you do not know the answer then don’t reply or answer what you can if you feel up to it

Thank you! 🙂