The first thing your sister will do is:
1, bank information, English required, such as? The bank? Tokyo Mitsubishi UFJ (ask the bank)
2. Account number
3. Bank address.
4. Bank? Swift? Code name, this number, the bank in Japan told your sister.
All the above contents are in English, and the bank will provide them.
Again, what you need to do is to go to the bank and remit money to your sister:
1 For example, if you want to remit money to your sister's Japanese bank in China Bank, you must open an account in China Bank.
Change the money you are going to remit to your sister into Japanese yen cash (for purchasing foreign exchange) to prepare for remittance.
3. Transfer your cash into Japanese yen directly to your sister's Japanese bank account.
The above international Japanese remittance is completed.
It should be note that:
1, your remittance to your sister is not RMB or Japanese yen, but the amount of RMB you want to remit is converted into Japanese yen cash;
The exchange rate changes with time, so the amount will change at any time.
I don't know if you understand the above. Ask if you don't understand.
I hope my reply can be adopted by you.