Looking to invest and set-up a business partnership; would like to double-check my approach

Hi folks! I’m looking to invest in a new business that I will be building together with my Japanese partners.

My understanding thus far is that my best bet would be to find a one-stop Judicial Scrivener Office so that they can help me with:
– Setting up and registering a business partnership for me and my Japanese partners
– Draft legal documents that set out our agreements regarding profit sharing and our responsibilities and liabilities etc
– Help with setting up a joint business account for me and my partners

Would there be anything else that I might have missed out or wrongly assumed?

Am also open to any advice/recommendations with regards to my situation!

Thanks guys!