Yes the bank account is hard. I still use my foreign account.

I setup my company and then got my bank account. I still don't use it.

I'm assuming anyone in this thread looking seriously at japan will be hiring the right operations person to help you. Otherwise, you can't get much done without speaking the language (day to day is fine,

but for example the immigration office expects you to know some japanese if not just bringing someone with you to help you)