Do I need to fund in the base currency of my account at IB Japan?

FUND YOUR ACCOUNT

Clients who reside in Japan can fund their domestic account at Interactive Brokers Securities Japan Inc. ("IBSJ" or "IB Japan") in JPY and other supported currencies: GBP, EUR and USD…

When you fund your  Interactive Brokers LLC (IBLLC) account in JPY, please make arrangements to send an international wire transfer. Please be sure to include your IBKR account name and number on the wire…

Clients who have an account with Interactive Brokers Australia Pty Ltd may fund their account in AUD, USD, EUR, HKD and GBP at the moment. We plan to support account funding in other currencies in the future…

IBSJ clients can make deposits and withdrawals in four Supported Cashiering Currencies – JPY, USD, EUR, and GBP.

Withdrawals are allowed in base currency (JPY) and positive balances of other supported currencies held in the account. If the client wants to withdraw funds, the system checks first if there are sufficient available funds in the requested or other supported currencies to cover 100% of the withdrawal amount. If there are insufficient funds in the requested currency, IBSJ will automatically convert positive balances in other available currencies to the requested one…