Using Rakuten Securities from abroad

My mutual fund and bond are a 特定口座/NISA in SBI, but I still have an old NISA in Rakuten. In response to recent incidents, both of them have implemented new security measures.

Rakuten implemented "risk-based authentication," which is triggered when you access from abroad. And additional authentication is done with a toll-free phone call(0120-) from a registered phone number, which can only be made from Japan. To access my own account from abroad, I need to call their customer service and temporarily disable the risk-based authentication by giving some private information(where, when, and why). They mentioned that exempt from their liability if the account is hacked and money is stolen during that period.

This is Rakuten's usual way of shifting the blame for technical shortcomings and responsibility onto users.
I don't want to keep a Rakuten Securities account, but unfortunately, Mutual funds held in NISA(old NISA) cannot be transferred.

I confirmed that I can access my SBI account from abroad w/o a problem.

by 831tm