I have tried over twenty already. Due to a change in the regulations in October, even ones that historically have been reliable to open accounts for expats (based upon reports on this and other groups) will not open. I have brought the rules with me. At the last encounter, at a stand-alone bank (which people recommend folks use), an immigration officer overheard the conversation and told the tellers I could not open the account. I was so thrilled that an immigration officer was there and should have known that an account was necessary BEFORE getting a non-O visa. However, she told them I needed a long-term visa in order to open an account. 🤦
Do not listen to all the stories from people saying, “I’ve never had a problem…”. I’ve never had one either. However, I’ve also been in this group for years and have seen the frantic posts from people denied boarding or entry. Fifty people may sail through with no problems. Do you want to be the fifty-first? Be prepared. You asked for a reason.
You’ll need a flight out in case your airlines asks. You can buy any inexpensive flight you can find or get an “onward ticket” (search online) that’s a throw away ticket for this precise purpose. Beyond that, follow the advice given for how to then extend your stay. Of course, if you decide to just make a quick roundtrip trip out, that solves both problems.